./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/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_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/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_3d91d41a-3068-4961-a098-85dd962877ca/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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:12:08,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:12:08,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:12:09,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:12:09,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:12:09,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:12:09,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:12:09,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:12:09,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:12:09,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:12:09,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:12:09,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:12:09,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:12:09,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:12:09,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:12:09,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:12:09,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:12:09,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:12:09,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:12:09,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:12:09,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:12:09,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:12:09,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:12:09,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:12:09,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:12:09,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:12:09,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:12:09,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:12:09,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:12:09,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:12:09,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:12:09,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:12:09,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:12:09,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:12:09,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:12:09,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:12:09,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:12:09,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:12:09,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:12:09,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:12:09,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:12:09,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:12:09,142 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:12:09,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:12:09,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:12:09,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:12:09,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:12:09,145 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:12:09,145 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:12:09,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:12:09,146 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:12:09,146 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:12:09,147 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:12:09,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:12:09,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:12:09,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:12:09,148 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:12:09,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:12:09,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:12:09,149 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:12:09,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:12:09,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:12:09,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:12:09,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:12:09,153 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:12:09,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:12:09,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:12:09,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:12:09,154 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:12:09,155 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:12:09,155 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:12:09,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:12:09,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:12:09,156 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:12:09,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:12:09,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:12:09,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:12:09,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:09,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:12:09,158 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:12:09,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:12:09,158 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:12:09,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:12:09,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:12:09,159 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_3d91d41a-3068-4961-a098-85dd962877ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-11-19 07:12:09,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:12:09,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:12:09,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:12:09,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:12:09,530 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:12:09,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-19 07:12:09,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/a859948d2/52df3c286ec04f249c61e62c685b06bb/FLAG3f7437399 [2022-11-19 07:12:10,256 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:12:10,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-19 07:12:10,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/a859948d2/52df3c286ec04f249c61e62c685b06bb/FLAG3f7437399 [2022-11-19 07:12:10,280 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/a859948d2/52df3c286ec04f249c61e62c685b06bb [2022-11-19 07:12:10,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:12:10,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:12:10,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:10,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:12:10,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:12:10,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:10" (1/1) ... [2022-11-19 07:12:10,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385d3190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:10, skipping insertion in model container [2022-11-19 07:12:10,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:10" (1/1) ... [2022-11-19 07:12:10,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:12:10,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:12:10,667 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_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-19 07:12:10,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:10,716 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 07:12:10,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b141334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:10, skipping insertion in model container [2022-11-19 07:12:10,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:10,718 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:12:10,722 INFO L158 Benchmark]: Toolchain (without parser) took 434.03ms. Allocated memory is still 119.5MB. Free memory was 82.5MB in the beginning and 96.0MB in the end (delta: -13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:12:10,724 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:12:10,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.69ms. Allocated memory is still 119.5MB. Free memory was 82.4MB in the beginning and 96.0MB in the end (delta: -13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:12:10,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 430.69ms. Allocated memory is still 119.5MB. Free memory was 82.4MB in the beginning and 96.0MB in the end (delta: -13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 153]: 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_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/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_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/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_3d91d41a-3068-4961-a098-85dd962877ca/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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:12:13,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:12:13,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:12:13,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:12:13,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:12:13,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:12:13,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:12:13,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:12:13,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:12:13,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:12:13,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:12:13,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:12:13,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:12:13,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:12:13,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:12:13,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:12:13,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:12:13,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:12:13,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:12:13,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:12:13,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:12:13,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:12:13,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:12:13,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:12:13,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:12:13,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:12:13,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:12:13,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:12:13,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:12:13,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:12:13,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:12:13,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:12:13,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:12:13,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:12:13,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:12:13,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:12:13,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:12:13,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:12:13,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:12:13,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:12:13,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:12:13,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:12:13,159 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:12:13,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:12:13,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:12:13,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:12:13,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:12:13,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:12:13,162 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:12:13,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:12:13,162 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:12:13,163 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:12:13,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:12:13,163 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:12:13,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:12:13,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:12:13,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:12:13,165 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:12:13,166 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:12:13,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:12:13,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:12:13,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:12:13,167 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:12:13,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:12:13,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:12:13,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:12:13,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:12:13,168 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:12:13,168 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:12:13,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:12:13,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:12:13,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:12:13,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:12:13,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:12:13,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:13,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:12:13,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:12:13,171 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:12:13,174 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:13,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:12:13,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:12:13,175 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_3d91d41a-3068-4961-a098-85dd962877ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-11-19 07:12:13,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:12:13,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:12:13,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:12:13,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:12:13,663 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:12:13,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-19 07:12:13,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/c91e16f57/452bd4d89c0044ed990d41f41cf34521/FLAGcbff6c2b7 [2022-11-19 07:12:14,299 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:12:14,300 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-19 07:12:14,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/c91e16f57/452bd4d89c0044ed990d41f41cf34521/FLAGcbff6c2b7 [2022-11-19 07:12:14,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/data/c91e16f57/452bd4d89c0044ed990d41f41cf34521 [2022-11-19 07:12:14,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:12:14,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:12:14,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:14,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:12:14,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:12:14,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:14" (1/1) ... [2022-11-19 07:12:14,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fc57c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:14, skipping insertion in model container [2022-11-19 07:12:14,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:12:14" (1/1) ... [2022-11-19 07:12:14,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:12:14,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:12:15,015 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_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-19 07:12:15,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:15,070 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:12:15,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:12:15,118 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_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-19 07:12:15,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:15,137 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:12:15,164 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_3d91d41a-3068-4961-a098-85dd962877ca/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-19 07:12:15,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:12:15,187 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:12:15,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15 WrapperNode [2022-11-19 07:12:15,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:12:15,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:12:15,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:12:15,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:12:15,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,259 INFO L138 Inliner]: procedures = 29, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 233 [2022-11-19 07:12:15,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:12:15,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:12:15,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:12:15,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:12:15,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:12:15,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:12:15,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:12:15,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:12:15,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (1/1) ... [2022-11-19 07:12:15,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:12:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:15,351 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:12:15,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:12:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:12:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:12:15,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:12:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:12:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:12:15,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:12:15,414 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:12:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:12:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:12:15,415 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:12:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 07:12:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 07:12:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:12:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:12:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:12:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:12:15,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:12:15,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:12:15,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:12:15,420 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:12:15,633 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:12:15,647 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:12:16,508 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:12:16,730 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:12:16,730 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:12:16,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:12:16 BoogieIcfgContainer [2022-11-19 07:12:16,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:12:16,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:12:16,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:12:16,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:12:16,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:12:14" (1/3) ... [2022-11-19 07:12:16,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8485fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:12:16, skipping insertion in model container [2022-11-19 07:12:16,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:12:15" (2/3) ... [2022-11-19 07:12:16,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8485fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:12:16, skipping insertion in model container [2022-11-19 07:12:16,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:12:16" (3/3) ... [2022-11-19 07:12:16,741 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2022-11-19 07:12:16,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:12:16,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-19 07:12:16,762 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:12:16,880 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-19 07:12:16,916 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:12:16,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 226 transitions, 496 flow [2022-11-19 07:12:16,934 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 226 transitions, 496 flow [2022-11-19 07:12:16,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 226 transitions, 496 flow [2022-11-19 07:12:17,081 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2022-11-19 07:12:17,082 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 07:12:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 209 events. 14/209 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 270 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 172. Up to 3 conditions per place. [2022-11-19 07:12:17,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2022-11-19 07:12:43,161 INFO L134 LiptonReduction]: Checked pairs total: 17008 [2022-11-19 07:12:43,162 INFO L136 LiptonReduction]: Total number of compositions: 208 [2022-11-19 07:12:43,171 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 86 places, 79 transitions, 202 flow [2022-11-19 07:12:43,412 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:43,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:12:43,435 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;@5b0ef90c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:12:43,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-11-19 07:12:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:12:43,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:43,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:12:43,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash 36151, now seen corresponding path program 1 times [2022-11-19 07:12:43,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310648154] [2022-11-19 07:12:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:43,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:43,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:43,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:43,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:12:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:12:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:43,699 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:12:43,701 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:12:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:43,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:43,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:43,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310648154] [2022-11-19 07:12:43,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310648154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:43,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:43,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43153888] [2022-11-19 07:12:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:43,803 INFO L87 Difference]: Start difference. First operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:44,299 INFO L93 Difference]: Finished difference Result 4370 states and 17374 transitions. [2022-11-19 07:12:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:12:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:44,361 INFO L225 Difference]: With dead ends: 4370 [2022-11-19 07:12:44,362 INFO L226 Difference]: Without dead ends: 4370 [2022-11-19 07:12:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:44,367 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:44,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:12:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2022-11-19 07:12:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4370. [2022-11-19 07:12:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 3910 states have (on average 4.443478260869565) internal successors, (17374), 4369 states have internal predecessors, (17374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 17374 transitions. [2022-11-19 07:12:44,757 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 17374 transitions. Word has length 2 [2022-11-19 07:12:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:44,759 INFO L495 AbstractCegarLoop]: Abstraction has 4370 states and 17374 transitions. [2022-11-19 07:12:44,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 17374 transitions. [2022-11-19 07:12:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:12:44,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:44,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:12:44,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:12:44,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:44,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash 36152, now seen corresponding path program 1 times [2022-11-19 07:12:44,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:44,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891942633] [2022-11-19 07:12:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:44,989 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:45,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:12:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:45,293 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:45,294 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:45,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:45,345 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:45,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891942633] [2022-11-19 07:12:45,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891942633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:45,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:45,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:45,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485246414] [2022-11-19 07:12:45,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:45,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:45,349 INFO L87 Difference]: Start difference. First operand 4370 states and 17374 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:45,888 INFO L93 Difference]: Finished difference Result 4400 states and 17446 transitions. [2022-11-19 07:12:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:12:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:45,932 INFO L225 Difference]: With dead ends: 4400 [2022-11-19 07:12:45,933 INFO L226 Difference]: Without dead ends: 4400 [2022-11-19 07:12:45,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:45,935 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:45,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:12:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2022-11-19 07:12:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4371. [2022-11-19 07:12:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.443364868320122) internal successors, (17378), 4370 states have internal predecessors, (17378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17378 transitions. [2022-11-19 07:12:46,227 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17378 transitions. Word has length 2 [2022-11-19 07:12:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:46,228 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17378 transitions. [2022-11-19 07:12:46,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17378 transitions. [2022-11-19 07:12:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:12:46,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:46,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:12:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:12:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:46,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 36298, now seen corresponding path program 1 times [2022-11-19 07:12:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:46,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595193870] [2022-11-19 07:12:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:46,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:46,444 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:46,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:12:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:46,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:46,668 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-19 07:12:46,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-19 07:12:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:46,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:46,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:46,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595193870] [2022-11-19 07:12:46,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595193870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:46,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:46,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606252887] [2022-11-19 07:12:46,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:46,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:46,773 INFO L87 Difference]: Start difference. First operand 4371 states and 17378 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:47,035 INFO L93 Difference]: Finished difference Result 4371 states and 17377 transitions. [2022-11-19 07:12:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:12:47,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:47,084 INFO L225 Difference]: With dead ends: 4371 [2022-11-19 07:12:47,084 INFO L226 Difference]: Without dead ends: 4371 [2022-11-19 07:12:47,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:47,086 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:47,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-19 07:12:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-19 07:12:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4371. [2022-11-19 07:12:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.443109179238046) internal successors, (17377), 4370 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17377 transitions. [2022-11-19 07:12:47,537 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17377 transitions. Word has length 2 [2022-11-19 07:12:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:47,539 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17377 transitions. [2022-11-19 07:12:47,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17377 transitions. [2022-11-19 07:12:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:12:47,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:47,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:12:47,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:47,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 36299, now seen corresponding path program 1 times [2022-11-19 07:12:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570226013] [2022-11-19 07:12:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:47,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:47,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:47,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:12:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:12:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:12:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:12:47,993 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:12:47,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:12:48,020 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 10 treesize of output 8 [2022-11-19 07:12:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:48,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:48,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570226013] [2022-11-19 07:12:48,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570226013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:48,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:48,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:48,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773528611] [2022-11-19 07:12:48,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:48,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:48,067 INFO L87 Difference]: Start difference. First operand 4371 states and 17377 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:48,336 INFO L93 Difference]: Finished difference Result 4371 states and 17376 transitions. [2022-11-19 07:12:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:12:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:48,380 INFO L225 Difference]: With dead ends: 4371 [2022-11-19 07:12:48,380 INFO L226 Difference]: Without dead ends: 4371 [2022-11-19 07:12:48,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:48,386 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:48,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-19 07:12:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-19 07:12:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4371. [2022-11-19 07:12:48,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.44285349015597) internal successors, (17376), 4370 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17376 transitions. [2022-11-19 07:12:48,637 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17376 transitions. Word has length 2 [2022-11-19 07:12:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:48,637 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17376 transitions. [2022-11-19 07:12:48,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17376 transitions. [2022-11-19 07:12:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:12:48,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:48,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:12:48,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:48,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:48,851 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:48,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1125151, now seen corresponding path program 1 times [2022-11-19 07:12:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:48,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329185220] [2022-11-19 07:12:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:48,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:48,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:48,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:12:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:12:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:49,052 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:49,052 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329185220] [2022-11-19 07:12:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329185220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143170264] [2022-11-19 07:12:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:49,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:49,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:12:49,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:12:49,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:12:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:12:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:49,779 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:49,780 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:49,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143170264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:49,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767289359] [2022-11-19 07:12:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:49,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:49,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:49,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:12:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:12:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:50,092 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:50,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:50,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767289359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:50,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:12:50,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:12:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830967951] [2022-11-19 07:12:50,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:50,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:12:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:50,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:12:50,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:12:50,326 INFO L87 Difference]: Start difference. First operand 4371 states and 17376 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:52,848 INFO L93 Difference]: Finished difference Result 4485 states and 17659 transitions. [2022-11-19 07:12:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:12:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:12:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:52,880 INFO L225 Difference]: With dead ends: 4485 [2022-11-19 07:12:52,880 INFO L226 Difference]: Without dead ends: 4485 [2022-11-19 07:12:52,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:12:52,881 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:52,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 47 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:12:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2022-11-19 07:12:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 4374. [2022-11-19 07:12:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4374 states, 3914 states have (on average 4.442514052120592) internal successors, (17388), 4373 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4374 states to 4374 states and 17388 transitions. [2022-11-19 07:12:53,098 INFO L78 Accepts]: Start accepts. Automaton has 4374 states and 17388 transitions. Word has length 3 [2022-11-19 07:12:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:53,098 INFO L495 AbstractCegarLoop]: Abstraction has 4374 states and 17388 transitions. [2022-11-19 07:12:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:53,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4374 states and 17388 transitions. [2022-11-19 07:12:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:12:53,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:53,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:12:53,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:12:53,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-19 07:12:53,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 07:12:53,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:53,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1125297, now seen corresponding path program 1 times [2022-11-19 07:12:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:53,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914183984] [2022-11-19 07:12:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:53,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:53,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:53,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:53,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:12:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:12:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:53,848 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-19 07:12:53,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-19 07:12:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:12:53,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:53,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:53,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914183984] [2022-11-19 07:12:53,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914183984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:53,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:12:53,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:12:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037040215] [2022-11-19 07:12:53,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:53,886 INFO L87 Difference]: Start difference. First operand 4374 states and 17388 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:54,219 INFO L93 Difference]: Finished difference Result 3580 states and 13781 transitions. [2022-11-19 07:12:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:12:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:54,244 INFO L225 Difference]: With dead ends: 3580 [2022-11-19 07:12:54,244 INFO L226 Difference]: Without dead ends: 3580 [2022-11-19 07:12:54,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:12:54,246 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:54,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 9 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:12:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2022-11-19 07:12:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3548. [2022-11-19 07:12:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 3209 states have (on average 4.276721720162044) internal successors, (13724), 3547 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 13724 transitions. [2022-11-19 07:12:54,410 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 13724 transitions. Word has length 3 [2022-11-19 07:12:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:54,410 INFO L495 AbstractCegarLoop]: Abstraction has 3548 states and 13724 transitions. [2022-11-19 07:12:54,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:54,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 13724 transitions. [2022-11-19 07:12:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:12:54,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:54,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:12:54,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:54,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1125298, now seen corresponding path program 1 times [2022-11-19 07:12:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361207287] [2022-11-19 07:12:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:54,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:54,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:12:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:54,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:12:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:12:54,815 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-19 07:12:54,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-11-19 07:12:54,827 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 10 treesize of output 8 [2022-11-19 07:12:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:55,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:55,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:55,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361207287] [2022-11-19 07:12:55,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361207287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:55,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815133344] [2022-11-19 07:12:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:12:55,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:12:55,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:12:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-19 07:12:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:12:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:12:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:55,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:12:55,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:12:55,425 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:12:55,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:12:55,436 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 10 treesize of output 8 [2022-11-19 07:12:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:12:55,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:12:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815133344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:12:55,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:12:55,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-19 07:12:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757122751] [2022-11-19 07:12:55,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:12:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:12:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:12:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:55,498 INFO L87 Difference]: Start difference. First operand 3548 states and 13724 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:12:55,664 INFO L93 Difference]: Finished difference Result 3547 states and 13720 transitions. [2022-11-19 07:12:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:12:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:12:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:12:55,688 INFO L225 Difference]: With dead ends: 3547 [2022-11-19 07:12:55,688 INFO L226 Difference]: Without dead ends: 3547 [2022-11-19 07:12:55,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:12:55,690 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:12:55,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-19 07:12:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-11-19 07:12:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3547. [2022-11-19 07:12:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3209 states have (on average 4.27547522592708) internal successors, (13720), 3546 states have internal predecessors, (13720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 13720 transitions. [2022-11-19 07:12:55,811 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 13720 transitions. Word has length 3 [2022-11-19 07:12:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:12:55,811 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 13720 transitions. [2022-11-19 07:12:55,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:12:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 13720 transitions. [2022-11-19 07:12:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:12:55,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:12:55,812 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:12:55,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:56,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:12:56,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:56,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:12:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:12:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -835957000, now seen corresponding path program 2 times [2022-11-19 07:12:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:12:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281932241] [2022-11-19 07:12:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:12:56,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:12:56,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:12:56,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:12:56,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:12:56,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:12:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:12:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:56,402 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:56,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:56,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:57,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:12:57,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281932241] [2022-11-19 07:12:57,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281932241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1718349159] [2022-11-19 07:12:57,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:12:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:12:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:12:57,334 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:12:57,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-19 07:12:57,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:12:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:12:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:57,714 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:57,714 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:57,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1718349159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713751417] [2022-11-19 07:12:58,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:12:58,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:12:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:12:58,831 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:12:58,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:12:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:12:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:12:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:12:58,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:12:59,053 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:12:59,054 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:12:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:59,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:12:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:12:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713751417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:12:59,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:12:59,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:12:59,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957242393] [2022-11-19 07:12:59,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:12:59,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:12:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:12:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:12:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:12:59,359 INFO L87 Difference]: Start difference. First operand 3547 states and 13720 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:07,245 INFO L93 Difference]: Finished difference Result 3793 states and 14313 transitions. [2022-11-19 07:13:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:13:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:13:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:07,266 INFO L225 Difference]: With dead ends: 3793 [2022-11-19 07:13:07,266 INFO L226 Difference]: Without dead ends: 3793 [2022-11-19 07:13:07,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:13:07,267 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 641 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:07,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 143 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-19 07:13:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2022-11-19 07:13:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3553. [2022-11-19 07:13:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3215 states have (on average 4.271228615863142) internal successors, (13732), 3552 states have internal predecessors, (13732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 13732 transitions. [2022-11-19 07:13:07,390 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 13732 transitions. Word has length 6 [2022-11-19 07:13:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:07,390 INFO L495 AbstractCegarLoop]: Abstraction has 3553 states and 13732 transitions. [2022-11-19 07:13:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 13732 transitions. [2022-11-19 07:13:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:13:07,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:07,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:13:07,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:13:07,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:07,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:08,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash -808734262, now seen corresponding path program 1 times [2022-11-19 07:13:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:08,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121383846] [2022-11-19 07:13:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:08,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:08,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:08,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 07:13:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:13:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:08,146 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-19 07:13:08,147 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-19 07:13:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:08,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:08,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121383846] [2022-11-19 07:13:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121383846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:08,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:08,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:13:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969593347] [2022-11-19 07:13:08,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:08,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:08,176 INFO L87 Difference]: Start difference. First operand 3553 states and 13732 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:08,465 INFO L93 Difference]: Finished difference Result 3440 states and 13283 transitions. [2022-11-19 07:13:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:08,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:13:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:08,484 INFO L225 Difference]: With dead ends: 3440 [2022-11-19 07:13:08,484 INFO L226 Difference]: Without dead ends: 3440 [2022-11-19 07:13:08,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:08,485 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:08,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 8 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2022-11-19 07:13:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3404. [2022-11-19 07:13:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3404 states, 3106 states have (on average 4.2533805537669025) internal successors, (13211), 3403 states have internal predecessors, (13211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3404 states to 3404 states and 13211 transitions. [2022-11-19 07:13:08,594 INFO L78 Accepts]: Start accepts. Automaton has 3404 states and 13211 transitions. Word has length 6 [2022-11-19 07:13:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:08,595 INFO L495 AbstractCegarLoop]: Abstraction has 3404 states and 13211 transitions. [2022-11-19 07:13:08,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3404 states and 13211 transitions. [2022-11-19 07:13:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:13:08,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:08,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:13:08,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:08,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:08,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -808734261, now seen corresponding path program 1 times [2022-11-19 07:13:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:08,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580344711] [2022-11-19 07:13:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:08,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:08,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:08,809 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:08,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 07:13:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:08,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:08,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:08,939 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:13:08,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 07:13:08,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-19 07:13:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:09,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:09,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:09,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580344711] [2022-11-19 07:13:09,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580344711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:09,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:09,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:13:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791096573] [2022-11-19 07:13:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:09,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:09,019 INFO L87 Difference]: Start difference. First operand 3404 states and 13211 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:09,291 INFO L93 Difference]: Finished difference Result 3232 states and 12626 transitions. [2022-11-19 07:13:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:13:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:09,314 INFO L225 Difference]: With dead ends: 3232 [2022-11-19 07:13:09,315 INFO L226 Difference]: Without dead ends: 3232 [2022-11-19 07:13:09,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:09,316 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:09,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-11-19 07:13:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3232. [2022-11-19 07:13:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 2978 states have (on average 4.239758226997985) internal successors, (12626), 3231 states have internal predecessors, (12626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 12626 transitions. [2022-11-19 07:13:09,480 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 12626 transitions. Word has length 6 [2022-11-19 07:13:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:09,481 INFO L495 AbstractCegarLoop]: Abstraction has 3232 states and 12626 transitions. [2022-11-19 07:13:09,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 12626 transitions. [2022-11-19 07:13:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:13:09,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:09,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:09,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:09,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:09,696 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash 692627711, now seen corresponding path program 1 times [2022-11-19 07:13:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:09,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853387638] [2022-11-19 07:13:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:09,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:13:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:13:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:09,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:13:09,893 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:13:09,894 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 07:13:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:09,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:09,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853387638] [2022-11-19 07:13:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853387638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:09,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:09,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807042589] [2022-11-19 07:13:09,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:09,909 INFO L87 Difference]: Start difference. First operand 3232 states and 12626 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:10,265 INFO L93 Difference]: Finished difference Result 2738 states and 10428 transitions. [2022-11-19 07:13:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:13:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:10,279 INFO L225 Difference]: With dead ends: 2738 [2022-11-19 07:13:10,279 INFO L226 Difference]: Without dead ends: 2738 [2022-11-19 07:13:10,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:10,280 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:10,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 11 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-11-19 07:13:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2738. [2022-11-19 07:13:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2738 states, 2544 states have (on average 4.099056603773585) internal successors, (10428), 2737 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2738 states to 2738 states and 10428 transitions. [2022-11-19 07:13:10,408 INFO L78 Accepts]: Start accepts. Automaton has 2738 states and 10428 transitions. Word has length 7 [2022-11-19 07:13:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 2738 states and 10428 transitions. [2022-11-19 07:13:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2738 states and 10428 transitions. [2022-11-19 07:13:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:13:10,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:10,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:10,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:10,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:10,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash 692627712, now seen corresponding path program 1 times [2022-11-19 07:13:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:10,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108596821] [2022-11-19 07:13:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:10,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:10,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:10,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:13:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:13:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:10,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:13:10,784 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 07:13:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:13:10,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:13:10,834 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:13:10,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:13:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:10,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:10,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:10,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108596821] [2022-11-19 07:13:10,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108596821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:10,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:10,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:10,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517932113] [2022-11-19 07:13:10,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:10,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:13:10,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:10,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:13:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:10,862 INFO L87 Difference]: Start difference. First operand 2738 states and 10428 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:11,305 INFO L93 Difference]: Finished difference Result 2244 states and 8230 transitions. [2022-11-19 07:13:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:13:11,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:13:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:11,316 INFO L225 Difference]: With dead ends: 2244 [2022-11-19 07:13:11,317 INFO L226 Difference]: Without dead ends: 2244 [2022-11-19 07:13:11,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:11,317 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:11,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 13 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:13:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-19 07:13:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2022-11-19 07:13:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2110 states have (on average 3.9004739336492893) internal successors, (8230), 2243 states have internal predecessors, (8230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 8230 transitions. [2022-11-19 07:13:11,417 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 8230 transitions. Word has length 7 [2022-11-19 07:13:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:11,418 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 8230 transitions. [2022-11-19 07:13:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 8230 transitions. [2022-11-19 07:13:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:13:11,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:11,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:11,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-19 07:13:11,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:11,635 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 195482204, now seen corresponding path program 1 times [2022-11-19 07:13:11,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:11,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169575747] [2022-11-19 07:13:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:11,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:11,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-19 07:13:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:11,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:11,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169575747] [2022-11-19 07:13:11,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169575747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:11,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:11,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:11,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949762666] [2022-11-19 07:13:11,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:13:11,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:13:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:11,806 INFO L87 Difference]: Start difference. First operand 2244 states and 8230 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:12,058 INFO L93 Difference]: Finished difference Result 1669 states and 5820 transitions. [2022-11-19 07:13:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:13:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:12,064 INFO L225 Difference]: With dead ends: 1669 [2022-11-19 07:13:12,064 INFO L226 Difference]: Without dead ends: 1669 [2022-11-19 07:13:12,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:12,066 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:12,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 7 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-11-19 07:13:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1669. [2022-11-19 07:13:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1598 states have (on average 3.642052565707134) internal successors, (5820), 1668 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5820 transitions. [2022-11-19 07:13:12,122 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5820 transitions. Word has length 8 [2022-11-19 07:13:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:12,122 INFO L495 AbstractCegarLoop]: Abstraction has 1669 states and 5820 transitions. [2022-11-19 07:13:12,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5820 transitions. [2022-11-19 07:13:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:13:12,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:12,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:12,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:12,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:12,338 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1764977842, now seen corresponding path program 1 times [2022-11-19 07:13:12,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:12,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902106890] [2022-11-19 07:13:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:12,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:12,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:12,340 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:12,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:13:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:13:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:12,498 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:13:12,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:13:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:12,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:12,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:12,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902106890] [2022-11-19 07:13:12,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902106890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:12,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:12,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:12,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630604114] [2022-11-19 07:13:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:13:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:13:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:13:12,539 INFO L87 Difference]: Start difference. First operand 1669 states and 5820 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:12,932 INFO L93 Difference]: Finished difference Result 1133 states and 3781 transitions. [2022-11-19 07:13:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:13:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:13:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:12,937 INFO L225 Difference]: With dead ends: 1133 [2022-11-19 07:13:12,937 INFO L226 Difference]: Without dead ends: 1133 [2022-11-19 07:13:12,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:12,938 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:12,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 9 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:13:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-11-19 07:13:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1107. [2022-11-19 07:13:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1074 states have (on average 3.492551210428305) internal successors, (3751), 1106 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3751 transitions. [2022-11-19 07:13:12,971 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3751 transitions. Word has length 9 [2022-11-19 07:13:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:12,972 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 3751 transitions. [2022-11-19 07:13:12,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3751 transitions. [2022-11-19 07:13:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:13:12,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:12,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:12,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:13,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1764977844, now seen corresponding path program 1 times [2022-11-19 07:13:13,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:13,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055555238] [2022-11-19 07:13:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:13,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:13,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 07:13:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:13:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:13,397 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:13:13,397 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:13:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:13,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:13,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055555238] [2022-11-19 07:13:13,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055555238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:13,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:13,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461566310] [2022-11-19 07:13:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:13,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:13:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:13:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:13,593 INFO L87 Difference]: Start difference. First operand 1107 states and 3751 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:14,151 INFO L93 Difference]: Finished difference Result 1111 states and 3761 transitions. [2022-11-19 07:13:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:13:14,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:13:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:14,155 INFO L225 Difference]: With dead ends: 1111 [2022-11-19 07:13:14,155 INFO L226 Difference]: Without dead ends: 1111 [2022-11-19 07:13:14,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:13:14,156 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:14,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:13:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-19 07:13:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1109. [2022-11-19 07:13:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1076 states have (on average 3.492565055762082) internal successors, (3758), 1108 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3758 transitions. [2022-11-19 07:13:14,187 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3758 transitions. Word has length 9 [2022-11-19 07:13:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:14,187 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 3758 transitions. [2022-11-19 07:13:14,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3758 transitions. [2022-11-19 07:13:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:13:14,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:14,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:14,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:14,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:14,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1045853773, now seen corresponding path program 1 times [2022-11-19 07:13:14,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:14,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545913397] [2022-11-19 07:13:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:14,405 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:14,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 07:13:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:14,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:13:14,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:14,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:14,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:14,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545913397] [2022-11-19 07:13:14,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545913397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:14,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:14,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367887844] [2022-11-19 07:13:14,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:14,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:13:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:13:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:14,657 INFO L87 Difference]: Start difference. First operand 1109 states and 3758 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:15,190 INFO L93 Difference]: Finished difference Result 1653 states and 5256 transitions. [2022-11-19 07:13:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:13:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:13:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:15,195 INFO L225 Difference]: With dead ends: 1653 [2022-11-19 07:13:15,195 INFO L226 Difference]: Without dead ends: 1653 [2022-11-19 07:13:15,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:13:15,196 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:15,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:13:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-11-19 07:13:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1436. [2022-11-19 07:13:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1403 states have (on average 3.3856022808267996) internal successors, (4750), 1435 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4750 transitions. [2022-11-19 07:13:15,236 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4750 transitions. Word has length 10 [2022-11-19 07:13:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:15,236 INFO L495 AbstractCegarLoop]: Abstraction has 1436 states and 4750 transitions. [2022-11-19 07:13:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4750 transitions. [2022-11-19 07:13:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:13:15,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:15,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:15,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:15,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:15,454 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1569812622, now seen corresponding path program 1 times [2022-11-19 07:13:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154159840] [2022-11-19 07:13:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:15,456 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:15,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 07:13:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:15,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:13:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:15,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:15,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154159840] [2022-11-19 07:13:15,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154159840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:15,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272940702] [2022-11-19 07:13:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:15,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:13:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:13:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:13:15,682 INFO L87 Difference]: Start difference. First operand 1436 states and 4750 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:16,171 INFO L93 Difference]: Finished difference Result 1539 states and 4831 transitions. [2022-11-19 07:13:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:13:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:13:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:16,175 INFO L225 Difference]: With dead ends: 1539 [2022-11-19 07:13:16,175 INFO L226 Difference]: Without dead ends: 1539 [2022-11-19 07:13:16,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:13:16,176 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:16,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 67 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:13:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-11-19 07:13:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1501. [2022-11-19 07:13:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1468 states have (on average 3.2568119891008176) internal successors, (4781), 1500 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 4781 transitions. [2022-11-19 07:13:16,216 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 4781 transitions. Word has length 10 [2022-11-19 07:13:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:16,217 INFO L495 AbstractCegarLoop]: Abstraction has 1501 states and 4781 transitions. [2022-11-19 07:13:16,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 4781 transitions. [2022-11-19 07:13:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:13:16,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:16,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:16,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:16,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:16,431 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash -264618700, now seen corresponding path program 1 times [2022-11-19 07:13:16,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:16,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147971225] [2022-11-19 07:13:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:16,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:16,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:16,433 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:16,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 07:13:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:16,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:13:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:16,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:16,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147971225] [2022-11-19 07:13:16,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147971225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1394097204] [2022-11-19 07:13:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:16,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:16,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:13:16,957 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:13:16,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 07:13:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:17,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:17,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1394097204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435556452] [2022-11-19 07:13:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:17,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:17,367 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:17,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:13:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:17,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:17,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435556452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:17,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:13:17,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:13:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112280211] [2022-11-19 07:13:17,642 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:13:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:17,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:13:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:17,643 INFO L87 Difference]: Start difference. First operand 1501 states and 4781 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:19,130 INFO L93 Difference]: Finished difference Result 2083 states and 6113 transitions. [2022-11-19 07:13:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:13:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:13:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:19,136 INFO L225 Difference]: With dead ends: 2083 [2022-11-19 07:13:19,136 INFO L226 Difference]: Without dead ends: 2083 [2022-11-19 07:13:19,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:13:19,137 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 395 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:19,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 180 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:13:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-11-19 07:13:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1618. [2022-11-19 07:13:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1585 states have (on average 3.125552050473186) internal successors, (4954), 1617 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 4954 transitions. [2022-11-19 07:13:19,183 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 4954 transitions. Word has length 11 [2022-11-19 07:13:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:19,183 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 4954 transitions. [2022-11-19 07:13:19,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 4954 transitions. [2022-11-19 07:13:19,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:13:19,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:19,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:19,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:19,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-19 07:13:19,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-19 07:13:19,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:19,798 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1414682201, now seen corresponding path program 1 times [2022-11-19 07:13:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:19,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260949918] [2022-11-19 07:13:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:19,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:19,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:19,801 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:19,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 07:13:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:13:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260949918] [2022-11-19 07:13:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260949918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816207608] [2022-11-19 07:13:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:20,270 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:13:20,271 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:13:20,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-19 07:13:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816207608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:20,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379075346] [2022-11-19 07:13:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:20,658 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:20,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:13:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:13:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:20,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379075346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:20,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:13:20,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:13:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737502344] [2022-11-19 07:13:20,945 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:13:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:13:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:13:20,946 INFO L87 Difference]: Start difference. First operand 1618 states and 4954 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:22,393 INFO L93 Difference]: Finished difference Result 1969 states and 5688 transitions. [2022-11-19 07:13:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:13:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:13:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:22,398 INFO L225 Difference]: With dead ends: 1969 [2022-11-19 07:13:22,398 INFO L226 Difference]: Without dead ends: 1969 [2022-11-19 07:13:22,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:13:22,399 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 440 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:22,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 267 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:13:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-11-19 07:13:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1475. [2022-11-19 07:13:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1442 states have (on average 3.1248266296809986) internal successors, (4506), 1474 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4506 transitions. [2022-11-19 07:13:22,441 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4506 transitions. Word has length 11 [2022-11-19 07:13:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:22,442 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 4506 transitions. [2022-11-19 07:13:22,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4506 transitions. [2022-11-19 07:13:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:13:22,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:22,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:22,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-19 07:13:22,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-19 07:13:22,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-19 07:13:23,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:23,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1938269235, now seen corresponding path program 1 times [2022-11-19 07:13:23,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:23,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660394032] [2022-11-19 07:13:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:23,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:23,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:23,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:23,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 07:13:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:13:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:23,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 07:13:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:23,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:23,198 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660394032] [2022-11-19 07:13:23,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660394032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:23,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:23,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209610819] [2022-11-19 07:13:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:23,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:23,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:23,200 INFO L87 Difference]: Start difference. First operand 1475 states and 4506 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:23,446 INFO L93 Difference]: Finished difference Result 1345 states and 4117 transitions. [2022-11-19 07:13:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:13:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:23,450 INFO L225 Difference]: With dead ends: 1345 [2022-11-19 07:13:23,450 INFO L226 Difference]: Without dead ends: 1345 [2022-11-19 07:13:23,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:23,451 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:23,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:13:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-11-19 07:13:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1345. [2022-11-19 07:13:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1320 states have (on average 3.118939393939394) internal successors, (4117), 1344 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4117 transitions. [2022-11-19 07:13:23,486 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4117 transitions. Word has length 11 [2022-11-19 07:13:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 4117 transitions. [2022-11-19 07:13:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4117 transitions. [2022-11-19 07:13:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:13:23,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:23,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:13:23,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:13:23,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:23,701 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:23,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1938269234, now seen corresponding path program 1 times [2022-11-19 07:13:23,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:23,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339818936] [2022-11-19 07:13:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:23,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:23,703 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:23,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 07:13:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:13:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:23,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:13:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:23,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:13:23,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339818936] [2022-11-19 07:13:23,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339818936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:23,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:23,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:13:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164562867] [2022-11-19 07:13:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:23,858 INFO L87 Difference]: Start difference. First operand 1345 states and 4117 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:13:24,122 INFO L93 Difference]: Finished difference Result 1215 states and 3728 transitions. [2022-11-19 07:13:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:13:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:13:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:13:24,124 INFO L225 Difference]: With dead ends: 1215 [2022-11-19 07:13:24,124 INFO L226 Difference]: Without dead ends: 1215 [2022-11-19 07:13:24,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:24,125 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:13:24,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:13:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-11-19 07:13:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2022-11-19 07:13:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1198 states have (on average 3.1118530884808013) internal successors, (3728), 1214 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3728 transitions. [2022-11-19 07:13:24,149 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3728 transitions. Word has length 11 [2022-11-19 07:13:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:13:24,150 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 3728 transitions. [2022-11-19 07:13:24,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:13:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3728 transitions. [2022-11-19 07:13:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:13:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:24,151 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 07:13:24,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:13:24,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:24,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:13:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1973030296, now seen corresponding path program 3 times [2022-11-19 07:13:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:13:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765582349] [2022-11-19 07:13:24,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:13:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:13:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:13:24,361 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:13:24,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 07:13:24,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:13:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:13:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:24,653 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:13:24,653 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:13:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:25,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:28,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:13:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765582349] [2022-11-19 07:13:28,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765582349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515601652] [2022-11-19 07:13:28,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:13:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:13:28,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:13:28,262 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:13:28,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 07:13:29,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:13:29,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:29,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:13:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:29,157 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:13:29,157 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:13:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:29,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:29,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515601652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76046959] [2022-11-19 07:13:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:13:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:13:29,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:29,733 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:13:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:13:32,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:13:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:13:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:13:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:13:32,440 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:13:32,441 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:13:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:32,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:13:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:13:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76046959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:13:33,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:13:33,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-19 07:13:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968244251] [2022-11-19 07:13:33,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:13:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:13:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:13:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:13:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:13:33,088 INFO L87 Difference]: Start difference. First operand 1215 states and 3728 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:01,735 INFO L93 Difference]: Finished difference Result 1545 states and 4507 transitions. [2022-11-19 07:14:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:14:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:14:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:01,740 INFO L225 Difference]: With dead ends: 1545 [2022-11-19 07:14:01,740 INFO L226 Difference]: Without dead ends: 1545 [2022-11-19 07:14:01,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=454, Invalid=806, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:14:01,741 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1052 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:01,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 209 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-19 07:14:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-19 07:14:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1227. [2022-11-19 07:14:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1210 states have (on average 3.100826446280992) internal successors, (3752), 1226 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 3752 transitions. [2022-11-19 07:14:01,764 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 3752 transitions. Word has length 12 [2022-11-19 07:14:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:01,765 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 3752 transitions. [2022-11-19 07:14:01,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 3752 transitions. [2022-11-19 07:14:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:14:01,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:01,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:01,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:01,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-19 07:14:02,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:14:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:02,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:14:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2060407597, now seen corresponding path program 2 times [2022-11-19 07:14:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:14:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141568728] [2022-11-19 07:14:02,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:14:02,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:14:02,373 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:14:02,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 07:14:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:14:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:14:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:02,603 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:14:02,603 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:14:02,686 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:14:02,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:14:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:02,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:14:02,916 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:14:02,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:14:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:03,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:14:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:03,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:03,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:14:03,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141568728] [2022-11-19 07:14:03,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141568728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:03,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:03,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:14:03,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639668312] [2022-11-19 07:14:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:14:03,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:14:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:14:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:14:03,242 INFO L87 Difference]: Start difference. First operand 1227 states and 3752 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:03,857 INFO L93 Difference]: Finished difference Result 1328 states and 4012 transitions. [2022-11-19 07:14:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:14:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:14:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:03,861 INFO L225 Difference]: With dead ends: 1328 [2022-11-19 07:14:03,861 INFO L226 Difference]: Without dead ends: 1328 [2022-11-19 07:14:03,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:14:03,862 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 30 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-11-19 07:14:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2022-11-19 07:14:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1283. [2022-11-19 07:14:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1266 states have (on average 3.0868878357030014) internal successors, (3908), 1282 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3908 transitions. [2022-11-19 07:14:03,893 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3908 transitions. Word has length 12 [2022-11-19 07:14:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:03,893 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 3908 transitions. [2022-11-19 07:14:03,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3908 transitions. [2022-11-19 07:14:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:14:03,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:03,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:03,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:04,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:04,107 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:14:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash -555258798, now seen corresponding path program 2 times [2022-11-19 07:14:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:14:04,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660060195] [2022-11-19 07:14:04,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:14:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:14:04,110 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:14:04,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 07:14:04,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:14:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:14:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:14:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:04,392 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:14:04,392 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:14:04,473 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:14:04,474 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:14:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:04,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:14:04,654 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:14:04,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:14:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:04,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:14:04,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:14:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660060195] [2022-11-19 07:14:04,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660060195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:04,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:04,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:14:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480507725] [2022-11-19 07:14:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:14:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:14:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:14:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:14:04,798 INFO L87 Difference]: Start difference. First operand 1283 states and 3908 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:05,974 INFO L93 Difference]: Finished difference Result 1616 states and 4983 transitions. [2022-11-19 07:14:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:14:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:14:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:05,979 INFO L225 Difference]: With dead ends: 1616 [2022-11-19 07:14:05,979 INFO L226 Difference]: Without dead ends: 1616 [2022-11-19 07:14:05,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:14:05,980 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:05,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 18 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 07:14:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-19 07:14:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1436. [2022-11-19 07:14:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1419 states have (on average 3.2318534178999294) internal successors, (4586), 1435 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4586 transitions. [2022-11-19 07:14:06,017 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4586 transitions. Word has length 12 [2022-11-19 07:14:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:06,017 INFO L495 AbstractCegarLoop]: Abstraction has 1436 states and 4586 transitions. [2022-11-19 07:14:06,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:06,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4586 transitions. [2022-11-19 07:14:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:14:06,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:06,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:06,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:06,231 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:14:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -105704875, now seen corresponding path program 1 times [2022-11-19 07:14:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:14:06,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674130949] [2022-11-19 07:14:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:06,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:06,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:14:06,233 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:14:06,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-19 07:14:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:14:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:06,448 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:14:06,448 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:14:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:06,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:14:07,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:14:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674130949] [2022-11-19 07:14:07,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674130949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1257706210] [2022-11-19 07:14:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:07,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:14:07,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:14:07,466 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:14:07,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 07:14:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:14:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:08,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1257706210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685296501] [2022-11-19 07:14:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:08,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:08,694 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:14:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:08,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:14:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:09,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:09,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685296501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:09,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:14:09,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 6, 6] total 23 [2022-11-19 07:14:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668714758] [2022-11-19 07:14:09,282 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:14:09,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:14:09,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:14:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:14:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:14:09,284 INFO L87 Difference]: Start difference. First operand 1436 states and 4586 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:26,856 INFO L93 Difference]: Finished difference Result 3178 states and 9316 transitions. [2022-11-19 07:14:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-19 07:14:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:14:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:26,865 INFO L225 Difference]: With dead ends: 3178 [2022-11-19 07:14:26,865 INFO L226 Difference]: Without dead ends: 3178 [2022-11-19 07:14:26,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=788, Invalid=2994, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:14:26,867 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1181 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 3412 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 3456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:26,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 853 Invalid, 3456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3412 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-19 07:14:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2022-11-19 07:14:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2170. [2022-11-19 07:14:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2153 states have (on average 3.236414305620065) internal successors, (6968), 2169 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6968 transitions. [2022-11-19 07:14:26,924 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6968 transitions. Word has length 12 [2022-11-19 07:14:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 2170 states and 6968 transitions. [2022-11-19 07:14:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:14:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6968 transitions. [2022-11-19 07:14:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:14:26,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:26,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:26,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:27,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-19 07:14:27,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:14:27,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:14:27,534 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:14:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -551871721, now seen corresponding path program 1 times [2022-11-19 07:14:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:14:27,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588896294] [2022-11-19 07:14:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:27,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:14:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:14:27,536 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:14:27,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 07:14:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:14:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:27,816 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:14:27,816 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:14:27,896 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:14:27,896 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:14:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:28,222 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 19 treesize of output 19 [2022-11-19 07:14:28,237 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:14:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:14:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:28,329 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 19 treesize of output 19 [2022-11-19 07:14:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:28,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:37,867 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:14:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588896294] [2022-11-19 07:14:37,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588896294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479418942] [2022-11-19 07:14:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:14:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:14:37,869 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:14:37,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 07:14:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:14:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:38,267 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:14:38,267 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:14:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:38,755 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 19 treesize of output 19 [2022-11-19 07:14:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:38,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:39,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:55,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479418942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:14:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309136194] [2022-11-19 07:14:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:55,343 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:55,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 07:14:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:14:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:55,581 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:14:55,581 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:14:56,793 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:14:56,793 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 07:14:56,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:14:56,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:14:56,840 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:14:56,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:14:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:14:57,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:09,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:15:09,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 174 [2022-11-19 07:15:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:15:17,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309136194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:17,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:15:17,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6, 6, 7] total 32 [2022-11-19 07:15:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217374298] [2022-11-19 07:15:17,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:15:17,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:15:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:15:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:15:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=984, Unknown=4, NotChecked=0, Total=1122 [2022-11-19 07:15:17,515 INFO L87 Difference]: Start difference. First operand 2170 states and 6968 transitions. Second operand has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:15:45,051 WARN L233 SmtUtils]: Spent 26.89s on a formula simplification. DAG size of input: 87 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:16:00,675 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 76 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:17:03,949 WARN L233 SmtUtils]: Spent 59.67s on a formula simplification. DAG size of input: 111 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:17:18,439 WARN L233 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 67 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:17:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:30,998 INFO L93 Difference]: Finished difference Result 2633 states and 8086 transitions. [2022-11-19 07:17:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:17:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:17:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:31,005 INFO L225 Difference]: With dead ends: 2633 [2022-11-19 07:17:31,005 INFO L226 Difference]: Without dead ends: 2633 [2022-11-19 07:17:31,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 170.9s TimeCoverageRelationStatistics Valid=235, Invalid=1562, Unknown=9, NotChecked=0, Total=1806 [2022-11-19 07:17:31,006 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 184 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 907 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:31,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 275 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 425 Invalid, 0 Unknown, 907 Unchecked, 1.2s Time] [2022-11-19 07:17:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2022-11-19 07:17:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2182. [2022-11-19 07:17:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2165 states have (on average 3.233718244803695) internal successors, (7001), 2181 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7001 transitions. [2022-11-19 07:17:31,057 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7001 transitions. Word has length 13 [2022-11-19 07:17:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:31,058 INFO L495 AbstractCegarLoop]: Abstraction has 2182 states and 7001 transitions. [2022-11-19 07:17:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:17:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7001 transitions. [2022-11-19 07:17:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:17:31,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:31,059 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:31,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:31,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-19 07:17:31,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-19 07:17:31,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:31,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:17:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:31,664 INFO L85 PathProgramCache]: Analyzing trace with hash -551872310, now seen corresponding path program 1 times [2022-11-19 07:17:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:31,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360749580] [2022-11-19 07:17:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:31,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:31,665 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:31,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:17:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:17:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:32,005 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:17:32,005 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:17:32,098 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:17:32,098 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:17:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:32,444 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 19 treesize of output 19 [2022-11-19 07:17:32,477 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:17:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:17:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:32,547 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 19 treesize of output 19 [2022-11-19 07:17:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:39,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360749580] [2022-11-19 07:17:39,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360749580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1022905561] [2022-11-19 07:17:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:39,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:17:39,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:17:39,374 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:17:39,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 07:17:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:17:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:39,764 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:17:39,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:17:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:40,369 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 19 treesize of output 19 [2022-11-19 07:17:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:40,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:17:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:40,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:17:45,192 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_~X_0~0.offset))) (and (or (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1205 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1205) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) c_~X_0~0.base))))))))) is different from false [2022-11-19 07:17:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:52,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1022905561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:17:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197136339] [2022-11-19 07:17:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:52,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:52,885 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:52,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 07:17:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:17:53,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:53,123 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:17:53,123 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:17:53,819 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:17:53,819 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 07:17:53,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:17:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:17:53,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:17:53,882 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:17:53,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:17:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:17:54,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:12,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:18:12,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 174 [2022-11-19 07:18:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:18:15,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197136339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:15,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:18:15,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 7] total 33 [2022-11-19 07:18:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693287363] [2022-11-19 07:18:15,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:18:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:18:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:18:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=983, Unknown=7, NotChecked=64, Total=1190 [2022-11-19 07:18:15,004 INFO L87 Difference]: Start difference. First operand 2182 states and 7001 transitions. Second operand has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:18:48,347 WARN L233 SmtUtils]: Spent 32.48s on a formula simplification. DAG size of input: 94 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:03,592 WARN L233 SmtUtils]: Spent 14.54s on a formula simplification. DAG size of input: 83 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:05,598 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32)))) (let ((.cse7 (bvadd (_ bv8 32) c_~X_0~0.offset)) (.cse4 (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)) .cse6)) (.cse3 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) (let ((.cse0 (and (or .cse4 .cse3) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1205 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse6 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1205) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))))) (.cse1 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse5 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|))))) (.cse2 (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse7))) (and (or .cse0 (not .cse1) (bvslt (bvadd |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| (_ bv1 32)) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (or .cse0 .cse1) (or .cse2 .cse3) (or (and (or .cse4 .cse5 .cse3) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (or (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32)) (v_ArrVal_1167 (_ BitVec 32))) (or (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse6 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_114| v_ArrVal_1167) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|)))))) .cse1) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1205 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse7 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1205) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) c_~X_0~0.base))))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (or (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32)) (v_ArrVal_1167 (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse7 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_114| v_ArrVal_1167) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) c_~X_0~0.base))))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_118| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118|) (_ bv0 1))) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_117| (_ BitVec 32)) (v_ArrVal_1243 (_ BitVec 1)) (v_ArrVal_1244 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1243) |v_thread1Thread1of1ForFork1_~#t3~0.base_117|))) (forall ((v_ArrVal_1245 (_ BitVec 32))) (bvule .cse7 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1244) |v_thread1Thread1of1ForFork1_~#t3~0.base_117| v_ArrVal_1245) c_~X_0~0.base))))))) (or .cse2 .cse5 .cse3) (or .cse2 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_118| (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_117| (_ BitVec 32)) (v_ArrVal_1243 (_ BitVec 1))) (or (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118|) (_ bv0 1))) (not (= (_ bv0 1) (select (store |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1243) |v_thread1Thread1of1ForFork1_~#t3~0.base_117|)))))))))) is different from false [2022-11-19 07:19:07,982 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (bvadd (_ bv8 32) c_~X_0~0.offset)) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32)))) (let ((.cse0 (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)) .cse2)) (.cse3 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse5 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|))))) (.cse1 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (.cse4 (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse6))) (and (or (and (or .cse0 .cse1) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1205 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse2 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1205) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))))))) .cse3) (or .cse4 .cse1) (or (and (or .cse0 .cse5 .cse1) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (or (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32)) (v_ArrVal_1167 (_ BitVec 32))) (or (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse2 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_114| v_ArrVal_1167) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|)))))) .cse3) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1205 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse6 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1205) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) c_~X_0~0.base))))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_114| (_ BitVec 32))) (or (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_113| (_ BitVec 32)) (v_ArrVal_1167 (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_113|)) (forall ((v_ArrVal_1168 (_ BitVec 32))) (bvule .cse6 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_114| v_ArrVal_1167) |v_thread1Thread1of1ForFork1_~#t3~0.base_113| v_ArrVal_1168) c_~X_0~0.base))))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_114|))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_118| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118|) (_ bv0 1))) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_117| (_ BitVec 32)) (v_ArrVal_1243 (_ BitVec 1)) (v_ArrVal_1244 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1243) |v_thread1Thread1of1ForFork1_~#t3~0.base_117|))) (forall ((v_ArrVal_1245 (_ BitVec 32))) (bvule .cse6 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1244) |v_thread1Thread1of1ForFork1_~#t3~0.base_117| v_ArrVal_1245) c_~X_0~0.base))))))) (or .cse4 .cse5 .cse1) (or .cse4 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_118| (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_117| (_ BitVec 32)) (v_ArrVal_1243 (_ BitVec 1))) (or (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118|) (_ bv0 1))) (not (= (_ bv0 1) (select (store |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_118| v_ArrVal_1243) |v_thread1Thread1of1ForFork1_~#t3~0.base_117|))))))))) is different from false [2022-11-19 07:19:24,841 WARN L233 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 74 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:35,092 INFO L93 Difference]: Finished difference Result 2649 states and 8126 transitions. [2022-11-19 07:19:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:19:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:19:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:35,098 INFO L225 Difference]: With dead ends: 2649 [2022-11-19 07:19:35,099 INFO L226 Difference]: Without dead ends: 2649 [2022-11-19 07:19:35,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 117.0s TimeCoverageRelationStatistics Valid=247, Invalid=1557, Unknown=14, NotChecked=252, Total=2070 [2022-11-19 07:19:35,099 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 226 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 893 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:35,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 193 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 455 Invalid, 0 Unknown, 893 Unchecked, 1.0s Time] [2022-11-19 07:19:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2022-11-19 07:19:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2182. [2022-11-19 07:19:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2165 states have (on average 3.233718244803695) internal successors, (7001), 2181 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7001 transitions. [2022-11-19 07:19:35,149 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7001 transitions. Word has length 13 [2022-11-19 07:19:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:35,150 INFO L495 AbstractCegarLoop]: Abstraction has 2182 states and 7001 transitions. [2022-11-19 07:19:35,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7001 transitions. [2022-11-19 07:19:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:19:35,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:35,151 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:35,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:35,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:19:35,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-19 07:19:35,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:35,759 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:19:35,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:35,759 INFO L85 PathProgramCache]: Analyzing trace with hash 671685910, now seen corresponding path program 2 times [2022-11-19 07:19:35,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112778260] [2022-11-19 07:19:35,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:19:35,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:35,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:35,761 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:35,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 07:19:35,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:19:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:19:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:19:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:36,013 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:19:36,013 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:19:36,101 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:19:36,102 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:19:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:36,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:19:36,346 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:19:36,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:19:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:36,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:19:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:19:36,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:36,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112778260] [2022-11-19 07:19:36,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112778260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:36,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:36,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:19:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108696967] [2022-11-19 07:19:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:19:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:19:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:19:36,715 INFO L87 Difference]: Start difference. First operand 2182 states and 7001 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:37,601 INFO L93 Difference]: Finished difference Result 2267 states and 7217 transitions. [2022-11-19 07:19:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:19:37,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 07:19:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:37,608 INFO L225 Difference]: With dead ends: 2267 [2022-11-19 07:19:37,608 INFO L226 Difference]: Without dead ends: 2267 [2022-11-19 07:19:37,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:19:37,608 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:37,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-11-19 07:19:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2022-11-19 07:19:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2172. [2022-11-19 07:19:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2155 states have (on average 3.2394431554524363) internal successors, (6981), 2171 states have internal predecessors, (6981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 6981 transitions. [2022-11-19 07:19:37,650 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 6981 transitions. Word has length 13 [2022-11-19 07:19:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:37,650 INFO L495 AbstractCegarLoop]: Abstraction has 2172 states and 6981 transitions. [2022-11-19 07:19:37,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 6981 transitions. [2022-11-19 07:19:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:19:37,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:37,652 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:37,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:19:37,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:37,858 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:19:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1985388562, now seen corresponding path program 1 times [2022-11-19 07:19:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:37,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748702178] [2022-11-19 07:19:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:37,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:37,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:37,860 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:37,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 07:19:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:19:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:38,220 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:19:38,220 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:19:38,319 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:19:38,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:19:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:38,998 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 19 treesize of output 19 [2022-11-19 07:19:39,031 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:19:39,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:19:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:39,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:48,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748702178] [2022-11-19 07:19:48,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748702178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:48,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201868342] [2022-11-19 07:19:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:48,907 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:48,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-19 07:19:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:19:49,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:49,501 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:19:49,502 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:19:50,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:50,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:19:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:50,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:56,330 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd c_~X_0~0.offset (_ bv12 32)))) (and (or (bvule (bvadd (_ bv8 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_122| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_122|)) (forall ((v_ArrVal_1369 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_122| v_ArrVal_1369) c_~X_0~0.base))))))) is different from false [2022-11-19 07:20:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:04,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201868342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:04,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609327735] [2022-11-19 07:20:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:04,816 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:04,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-19 07:20:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:20:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:05,118 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:20:05,118 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:20:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:05,852 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 19 treesize of output 19 [2022-11-19 07:20:05,869 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:20:05,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:20:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:05,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:09,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:20:09,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 65 [2022-11-19 07:20:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:11,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609327735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:11,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:20:11,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 36 [2022-11-19 07:20:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557545286] [2022-11-19 07:20:11,102 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:20:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:20:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1200, Unknown=1, NotChecked=70, Total=1406 [2022-11-19 07:20:11,104 INFO L87 Difference]: Start difference. First operand 2172 states and 6981 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:44,836 WARN L233 SmtUtils]: Spent 32.43s on a formula simplification. DAG size of input: 69 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:20:59,320 WARN L233 SmtUtils]: Spent 13.59s on a formula simplification. DAG size of input: 59 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:22:09,841 WARN L233 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 85 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:22:29,073 WARN L233 SmtUtils]: Spent 18.51s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:23:16,942 WARN L233 SmtUtils]: Spent 46.60s on a formula simplification. DAG size of input: 75 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:23:55,749 WARN L233 SmtUtils]: Spent 26.53s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:23:58,506 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvmul (_ bv4 32) c_~i_7~0))) (let ((.cse0 (bvadd .cse2 c_~X_0~0.offset (_ bv12 32)))) (let ((.cse1 (bvule (bvadd .cse2 (_ bv8 32) c_~X_0~0.offset) .cse0))) (and (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_120| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_120|))) (forall ((v_ArrVal_1329 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_120| v_ArrVal_1329) c_~X_0~0.base))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1369 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_122| v_ArrVal_1369) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_122|)))) (or .cse1 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (or (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_120| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_120|)))) .cse1))))) is different from false [2022-11-19 07:24:00,894 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvmul (_ bv4 32) c_~i_7~0))) (let ((.cse1 (bvadd .cse2 (_ bv8 32) c_~X_0~0.offset))) (let ((.cse0 (bvule (bvadd .cse2 (_ bv4 32) c_~X_0~0.offset) .cse1))) (and (or (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_120| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_120|)))) .cse0) (or .cse0 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1369 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_122| v_ArrVal_1369) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_122|)))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_120| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_120|))) (forall ((v_ArrVal_1329 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_120| v_ArrVal_1329) c_~X_0~0.base))))))))) is different from false [2022-11-19 07:24:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:02,504 INFO L93 Difference]: Finished difference Result 2825 states and 8533 transitions. [2022-11-19 07:24:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:24:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:24:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:02,514 INFO L225 Difference]: With dead ends: 2825 [2022-11-19 07:24:02,514 INFO L226 Difference]: Without dead ends: 2825 [2022-11-19 07:24:02,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 257.1s TimeCoverageRelationStatistics Valid=314, Invalid=2451, Unknown=3, NotChecked=312, Total=3080 [2022-11-19 07:24:02,516 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 295 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2270 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:02,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 375 Invalid, 3075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 795 Invalid, 0 Unknown, 2270 Unchecked, 2.6s Time] [2022-11-19 07:24:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-11-19 07:24:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2191. [2022-11-19 07:24:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2174 states have (on average 3.234590616375345) internal successors, (7032), 2190 states have internal predecessors, (7032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7032 transitions. [2022-11-19 07:24:02,590 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7032 transitions. Word has length 14 [2022-11-19 07:24:02,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:02,591 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 7032 transitions. [2022-11-19 07:24:02,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7032 transitions. [2022-11-19 07:24:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:24:02,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:02,593 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:02,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:02,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-19 07:24:03,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -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 07:24:03,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:03,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:24:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 71847456, now seen corresponding path program 1 times [2022-11-19 07:24:03,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:03,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937836133] [2022-11-19 07:24:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:03,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:03,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:03,200 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:03,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-19 07:24:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:24:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:03,518 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:24:03,518 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:24:03,622 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:24:03,622 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:24:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:04,025 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 19 treesize of output 19 [2022-11-19 07:24:04,041 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:24:04,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:24:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:04,138 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 19 treesize of output 19 [2022-11-19 07:24:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:04,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:13,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937836133] [2022-11-19 07:24:13,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937836133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:13,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051183392] [2022-11-19 07:24:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:13,017 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:24:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:24:13,018 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:24:13,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-19 07:24:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:24:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:13,444 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:24:13,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:24:13,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:13,945 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 19 treesize of output 19 [2022-11-19 07:24:14,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:14,119 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 19 treesize of output 19 [2022-11-19 07:24:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:16,780 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_~X_0~0.offset))) (and (or (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_128| (_ BitVec 32))) (or (forall ((v_ArrVal_1487 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1450 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_128| v_ArrVal_1487) |v_thread1Thread1of1ForFork1_~#t3~0.base_122| v_ArrVal_1450) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_122|)))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_128|)))))) is different from false [2022-11-19 07:24:29,795 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:24:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2051183392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786007508] [2022-11-19 07:24:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:34,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:34,494 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:34,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-19 07:24:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:34,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:24:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:34,787 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:24:34,787 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:24:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:35,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:24:35,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:24:35,658 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 07:24:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:35,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:24:35,695 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:24:35,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:24:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:46,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:24:46,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 65 [2022-11-19 07:24:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:47,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786007508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:47,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:24:47,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 6] total 32 [2022-11-19 07:24:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116673021] [2022-11-19 07:24:47,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:24:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:47,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:24:47,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=4, NotChecked=62, Total=1122 [2022-11-19 07:24:47,341 INFO L87 Difference]: Start difference. First operand 2191 states and 7032 transitions. Second operand has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:26,125 WARN L233 SmtUtils]: Spent 37.82s on a formula simplification. DAG size of input: 83 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:38,067 WARN L233 SmtUtils]: Spent 11.23s on a formula simplification. DAG size of input: 72 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:40,075 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32)))) (let ((.cse5 (bvadd (_ bv8 32) c_~X_0~0.offset)) (.cse2 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_126| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_126|))))) (.cse8 (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)) .cse10)) (.cse1 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (.cse11 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (let ((.cse7 (not .cse11)) (.cse4 (bvslt (bvadd |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| (_ bv1 32)) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse6 (and (or .cse8 .cse1) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_128| (_ BitVec 32))) (or (forall ((v_ArrVal_1487 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1450 (_ BitVec 32))) (bvule .cse10 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_128| v_ArrVal_1487) |v_thread1Thread1of1ForFork1_~#t3~0.base_122| v_ArrVal_1450) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_122|)))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_128|)))))) (.cse3 (and (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_126| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_126|))) (forall ((v_ArrVal_1449 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1450 (_ BitVec 32))) (bvule .cse10 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_126| v_ArrVal_1449) |v_thread1Thread1of1ForFork1_~#t3~0.base_122| v_ArrVal_1450) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_122|)))))) (or .cse8 .cse1 .cse2))) (.cse0 (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse5)) (.cse9 (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_126| (_ BitVec 32))) (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t3~0.base_126|) (_ bv0 1)))))) (and (or .cse0 .cse1 .cse2) (or .cse3 (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) (bvmul (_ bv4 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (select |c_#length| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse4) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_126| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t3~0.base_126|) (_ bv0 1))) (forall ((v_ArrVal_1527 (_ BitVec 32))) (bvule .cse5 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t3~0.base_126| v_ArrVal_1527) c_~X_0~0.base))))) (or .cse0 .cse1) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_128| (_ BitVec 32))) (or (forall ((v_ArrVal_1487 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1450 (_ BitVec 32))) (bvule .cse5 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_128| v_ArrVal_1487) |v_thread1Thread1of1ForFork1_~#t3~0.base_122| v_ArrVal_1450) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_122|)))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_128|)))) (or .cse6 .cse7 .cse4) (or (and (or .cse8 .cse9) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_126| (_ BitVec 32))) (or (forall ((v_ArrVal_1527 (_ BitVec 32))) (bvule .cse10 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t3~0.base_126| v_ArrVal_1527) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (= (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t3~0.base_126|) (_ bv0 1)))))) .cse7 .cse4) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_126| (_ BitVec 32))) (or (forall ((v_ArrVal_1449 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_1450 (_ BitVec 32))) (bvule .cse5 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_126| v_ArrVal_1449) |v_thread1Thread1of1ForFork1_~#t3~0.base_122| v_ArrVal_1450) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_122|)))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_126|))))) (or .cse6 .cse11) (or .cse3 .cse11) (or .cse0 .cse9))))) is different from false [2022-11-19 07:26:12,818 WARN L233 SmtUtils]: Spent 26.57s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:27,854 WARN L233 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 63 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:34,412 INFO L93 Difference]: Finished difference Result 2565 states and 7969 transitions. [2022-11-19 07:26:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:26:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:26:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:34,418 INFO L225 Difference]: With dead ends: 2565 [2022-11-19 07:26:34,418 INFO L226 Difference]: Without dead ends: 2565 [2022-11-19 07:26:34,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 145.5s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=8, NotChecked=158, Total=1806 [2022-11-19 07:26:34,419 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:34,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 171 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 609 Unchecked, 1.3s Time] [2022-11-19 07:26:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2022-11-19 07:26:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2215. [2022-11-19 07:26:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2198 states have (on average 3.2320291173794358) internal successors, (7104), 2214 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 7104 transitions. [2022-11-19 07:26:34,456 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 7104 transitions. Word has length 14 [2022-11-19 07:26:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:34,456 INFO L495 AbstractCegarLoop]: Abstraction has 2215 states and 7104 transitions. [2022-11-19 07:26:34,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 7104 transitions. [2022-11-19 07:26:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:26:34,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:34,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:34,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:34,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-19 07:26:34,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-19 07:26:35,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:35,071 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:26:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 71805575, now seen corresponding path program 1 times [2022-11-19 07:26:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190087165] [2022-11-19 07:26:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:35,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:35,073 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:35,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-19 07:26:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:35,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:26:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:35,347 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:26:35,347 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:26:35,464 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 07:26:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:35,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:36,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:36,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190087165] [2022-11-19 07:26:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190087165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:36,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476626100] [2022-11-19 07:26:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:36,122 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:36,123 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-19 07:26:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:36,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:26:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:36,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:37,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476626100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902387111] [2022-11-19 07:26:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:37,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:37,108 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:37,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 07:26:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:26:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:37,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:37,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902387111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:37,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:37,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 19 [2022-11-19 07:26:37,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580276853] [2022-11-19 07:26:37,704 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:37,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:26:37,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:37,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:26:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:26:37,705 INFO L87 Difference]: Start difference. First operand 2215 states and 7104 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:42,374 INFO L93 Difference]: Finished difference Result 2805 states and 8224 transitions. [2022-11-19 07:26:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:26:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:26:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:42,380 INFO L225 Difference]: With dead ends: 2805 [2022-11-19 07:26:42,380 INFO L226 Difference]: Without dead ends: 2805 [2022-11-19 07:26:42,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=272, Invalid=918, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:26:42,381 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 870 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:42,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 340 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 07:26:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2022-11-19 07:26:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2239. [2022-11-19 07:26:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2222 states have (on average 3.1102610261026102) internal successors, (6911), 2238 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 6911 transitions. [2022-11-19 07:26:42,416 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 6911 transitions. Word has length 14 [2022-11-19 07:26:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:42,416 INFO L495 AbstractCegarLoop]: Abstraction has 2239 states and 6911 transitions. [2022-11-19 07:26:42,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 6911 transitions. [2022-11-19 07:26:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:26:42,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:42,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:42,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-19 07:26:42,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-19 07:26:42,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:43,019 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:26:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash -652571058, now seen corresponding path program 2 times [2022-11-19 07:26:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:43,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924317666] [2022-11-19 07:26:43,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:43,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:43,021 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:43,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 07:26:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:26:43,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:26:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:43,309 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-19 07:26:43,309 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-19 07:26:43,410 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:26:43,411 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:26:43,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:43,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:26:43,694 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:43,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:43,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:26:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:26:44,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:44,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924317666] [2022-11-19 07:26:44,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924317666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:44,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:44,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:26:44,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173585974] [2022-11-19 07:26:44,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:44,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:26:44,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:26:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:44,102 INFO L87 Difference]: Start difference. First operand 2239 states and 6911 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:44,780 INFO L93 Difference]: Finished difference Result 2441 states and 7539 transitions. [2022-11-19 07:26:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:26:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:26:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:44,785 INFO L225 Difference]: With dead ends: 2441 [2022-11-19 07:26:44,785 INFO L226 Difference]: Without dead ends: 2441 [2022-11-19 07:26:44,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:26:44,786 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:44,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 31 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-11-19 07:26:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-11-19 07:26:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2235. [2022-11-19 07:26:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2218 states have (on average 3.136609558160505) internal successors, (6957), 2234 states have internal predecessors, (6957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6957 transitions. [2022-11-19 07:26:44,823 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6957 transitions. Word has length 14 [2022-11-19 07:26:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:44,824 INFO L495 AbstractCegarLoop]: Abstraction has 2235 states and 6957 transitions. [2022-11-19 07:26:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6957 transitions. [2022-11-19 07:26:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:26:44,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:44,825 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:44,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-19 07:26:45,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:45,025 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-19 07:26:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -7363090, now seen corresponding path program 2 times [2022-11-19 07:26:45,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520045343] [2022-11-19 07:26:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:45,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:45,027 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:45,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-19 07:26:45,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:26:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:45,327 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:26:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-19 07:26:45,406 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:26:45,406 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:26:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:45,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 07:26:45,583 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:26:45,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:26:45,642 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:26:45,643 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 07:26:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:45,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:49,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520045343] [2022-11-19 07:26:49,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520045343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691847892] [2022-11-19 07:26:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:49,033 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:49,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-19 07:26:49,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:26:49,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:49,575 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:26:49,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:26:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:50,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:26:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:26:50,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:26:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:54,394 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd c_~X_0~0.offset (_ bv12 32)))) (and (or (bvule (bvadd (_ bv8 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_140| (_ BitVec 32))) (or (forall ((v_ArrVal_1758 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_136| (_ BitVec 32))) (or (forall ((v_ArrVal_1759 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_140| v_ArrVal_1758) |v_thread1Thread1of1ForFork1_~#t3~0.base_136| v_ArrVal_1759) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_136|)))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_140|)))))) is different from false [2022-11-19 07:27:10,753 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:10,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691847892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:10,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655928983] [2022-11-19 07:27:10,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:10,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:10,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:10,755 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:10,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d91d41a-3068-4961-a098-85dd962877ca/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-19 07:27:10,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:10,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:27:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:11,087 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 07:27:11,087 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 07:27:11,171 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 07:27:11,171 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 07:27:12,089 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:27:12,090 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 07:27:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:27:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:12,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:27:12,139 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:27:12,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-19 07:27:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:12,884 INFO L328 TraceCheckSpWp]: Computing backward predicates...