./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- 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-e04fb08 [2022-11-16 11:20:39,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:20:39,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:20:39,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:20:39,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:20:39,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:20:39,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:20:39,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:20:39,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:20:39,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:20:39,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:20:39,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:20:39,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:20:39,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:20:39,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:20:39,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:20:39,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:20:39,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:20:39,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:20:39,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:20:39,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:20:39,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:20:39,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:20:39,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:20:39,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:20:39,865 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:20:39,865 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:20:39,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:20:39,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:20:39,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:20:39,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:20:39,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:20:39,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:20:39,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:20:39,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:20:39,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:20:39,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:20:39,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:20:39,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:20:39,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:20:39,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:20:39,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:20:39,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:20:39,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:20:39,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:20:39,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:20:39,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:20:39,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:20:39,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:20:39,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:20:39,912 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:20:39,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:20:39,913 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:20:39,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:20:39,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:20:39,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:20:39,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:20:39,914 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:20:39,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:20:39,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:20:39,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:20:39,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:20:39,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:20:39,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:20:39,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:20:39,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:20:39,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:20:39,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:20:39,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:20:39,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:20:39,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:20:39,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:20:39,919 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_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-16 11:20:40,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:20:40,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:20:40,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:20:40,218 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:20:40,221 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:20:40,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 11:20:40,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/b4cd9d8aa/ec4d60f0013a486189ef03d042cef82e/FLAG13867afb8 [2022-11-16 11:20:40,872 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:20:40,873 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 11:20:40,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/b4cd9d8aa/ec4d60f0013a486189ef03d042cef82e/FLAG13867afb8 [2022-11-16 11:20:41,251 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/b4cd9d8aa/ec4d60f0013a486189ef03d042cef82e [2022-11-16 11:20:41,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:20:41,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:20:41,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:20:41,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:20:41,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:20:41,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:20:41" (1/1) ... [2022-11-16 11:20:41,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f7420a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:41, skipping insertion in model container [2022-11-16 11:20:41,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:20:41" (1/1) ... [2022-11-16 11:20:41,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:20:41,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:20:41,540 WARN L229 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_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 11:20:41,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:20:41,556 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) [2022-11-16 11:20:41,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27d3c208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:41, skipping insertion in model container [2022-11-16 11:20:41,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:20:41,566 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:20:41,567 INFO L158 Benchmark]: Toolchain (without parser) took 308.95ms. Allocated memory is still 111.1MB. Free memory was 67.3MB in the beginning and 86.6MB in the end (delta: -19.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2022-11-16 11:20:41,568 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 111.1MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:20:41,568 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.69ms. Allocated memory is still 111.1MB. Free memory was 67.1MB in the beginning and 86.6MB in the end (delta: -19.5MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2022-11-16 11:20:41,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91ms. Allocated memory is still 111.1MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.69ms. Allocated memory is still 111.1MB. Free memory was 67.1MB in the beginning and 86.6MB in the end (delta: -19.5MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- 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-e04fb08 [2022-11-16 11:20:43,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:20:43,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:20:43,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:20:43,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:20:43,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:20:43,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:20:43,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:20:43,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:20:43,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:20:43,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:20:43,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:20:43,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:20:43,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:20:43,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:20:43,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:20:43,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:20:43,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:20:43,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:20:43,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:20:43,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:20:43,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:20:43,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:20:43,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:20:43,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:20:43,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:20:43,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:20:43,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:20:43,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:20:43,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:20:43,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:20:43,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:20:43,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:20:43,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:20:43,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:20:43,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:20:43,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:20:43,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:20:43,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:20:43,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:20:43,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:20:43,785 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:20:43,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:20:43,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:20:43,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:20:43,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:20:43,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:20:43,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:20:43,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:20:43,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:20:43,833 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:20:43,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:20:43,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:20:43,834 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:20:43,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:20:43,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:20:43,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:20:43,835 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:20:43,835 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:20:43,835 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:20:43,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:20:43,836 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:20:43,836 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:20:43,836 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:20:43,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:20:43,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:20:43,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:20:43,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:20:43,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:20:43,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:20:43,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:20:43,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:20:43,839 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:20:43,839 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:20:43,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:20:43,840 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_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-11-16 11:20:44,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:20:44,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:20:44,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:20:44,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:20:44,253 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:20:44,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 11:20:44,329 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/7a015b754/1c634481e4944c17a3a1e70a1c2d45be/FLAG0c5bb19dc [2022-11-16 11:20:44,845 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:20:44,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-11-16 11:20:44,853 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/7a015b754/1c634481e4944c17a3a1e70a1c2d45be/FLAG0c5bb19dc [2022-11-16 11:20:45,218 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/data/7a015b754/1c634481e4944c17a3a1e70a1c2d45be [2022-11-16 11:20:45,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:20:45,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:20:45,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:20:45,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:20:45,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:20:45,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e9708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45, skipping insertion in model container [2022-11-16 11:20:45,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:20:45,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:20:45,461 WARN L229 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_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 11:20:45,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:20:45,505 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:20:45,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:20:45,539 WARN L229 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_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 11:20:45,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:20:45,557 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:20:45,594 WARN L229 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_44f0938b-51e5-470e-a289-f90bf339f7b6/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-11-16 11:20:45,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:20:45,629 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:20:45,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45 WrapperNode [2022-11-16 11:20:45,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:20:45,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:20:45,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:20:45,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:20:45,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,699 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-11-16 11:20:45,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:20:45,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:20:45,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:20:45,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:20:45,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,760 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:20:45,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:20:45,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:20:45,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:20:45,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (1/1) ... [2022-11-16 11:20:45,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:20:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:45,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:20:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:20:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:20:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:20:45,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:20:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:20:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:20:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:20:45,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:20:45,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:20:45,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:20:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:20:45,855 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 11:20:45,855 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 11:20:45,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:20:45,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:20:45,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:20:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:20:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:20:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:20:45,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:20:45,858 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:20:45,997 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:20:45,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:20:46,710 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:20:46,973 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:20:46,974 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:20:46,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:20:46 BoogieIcfgContainer [2022-11-16 11:20:46,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:20:46,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:20:46,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:20:46,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:20:46,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:20:45" (1/3) ... [2022-11-16 11:20:46,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ef7363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:20:46, skipping insertion in model container [2022-11-16 11:20:46,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:20:45" (2/3) ... [2022-11-16 11:20:46,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ef7363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:20:46, skipping insertion in model container [2022-11-16 11:20:46,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:20:46" (3/3) ... [2022-11-16 11:20:46,988 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-11-16 11:20:47,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:20:47,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-16 11:20:47,008 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:20:47,246 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:20:47,295 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:20:47,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-16 11:20:47,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-11-16 11:20:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-11-16 11:20:47,453 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-11-16 11:20:47,453 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:20:47,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 278 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-16 11:20:47,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-11-16 11:21:23,997 INFO L134 LiptonReduction]: Checked pairs total: 8689 [2022-11-16 11:21:23,998 INFO L136 LiptonReduction]: Total number of compositions: 206 [2022-11-16 11:21:24,008 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-11-16 11:21:24,629 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:24,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:21:24,660 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;@7e672514, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:21:24,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-16 11:21:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:21:24,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:24,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:21:24,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 27727, now seen corresponding path program 1 times [2022-11-16 11:21:24,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:24,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769127843] [2022-11-16 11:21:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:24,780 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 [2022-11-16 11:21:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:24,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:24,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:21:24,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:25,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:25,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:25,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769127843] [2022-11-16 11:21:25,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769127843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:25,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:25,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:25,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312794280] [2022-11-16 11:21:25,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:25,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:25,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:25,152 INFO L87 Difference]: Start difference. First operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 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) [2022-11-16 11:21:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:25,718 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-11-16 11:21:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:25,723 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 [2022-11-16 11:21:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:25,867 INFO L225 Difference]: With dead ends: 4508 [2022-11-16 11:21:25,868 INFO L226 Difference]: Without dead ends: 4508 [2022-11-16 11:21:25,869 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 [2022-11-16 11:21:25,885 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:25,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:21:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-11-16 11:21:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-11-16 11:21:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4029 states have (on average 4.486721270786796) internal successors, (18077), 4505 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-11-16 11:21:26,425 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-11-16 11:21:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:26,426 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-11-16 11:21:26,426 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) [2022-11-16 11:21:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-11-16 11:21:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:21:26,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:26,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:21:26,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:26,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:26,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash 27631, now seen corresponding path program 1 times [2022-11-16 11:21:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692840458] [2022-11-16 11:21:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:26,678 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 [2022-11-16 11:21:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:26,679 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:26,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:21:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:26,996 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 11:21:26,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 11:21:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:27,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:27,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692840458] [2022-11-16 11:21:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692840458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:27,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639466207] [2022-11-16 11:21:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:27,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:27,049 INFO L87 Difference]: Start difference. First operand 4506 states and 18077 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) [2022-11-16 11:21:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:27,407 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-11-16 11:21:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:27,407 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 [2022-11-16 11:21:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:27,489 INFO L225 Difference]: With dead ends: 4505 [2022-11-16 11:21:27,489 INFO L226 Difference]: Without dead ends: 4505 [2022-11-16 11:21:27,489 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 [2022-11-16 11:21:27,492 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:27,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:21:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-16 11:21:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-16 11:21:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.486224869694714) internal successors, (18075), 4504 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-11-16 11:21:27,855 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-11-16 11:21:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:27,855 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-11-16 11:21:27,856 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) [2022-11-16 11:21:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-11-16 11:21:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:21:27,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:27,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:21:27,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-16 11:21:28,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:28,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:28,072 INFO L85 PathProgramCache]: Analyzing trace with hash 27632, now seen corresponding path program 1 times [2022-11-16 11:21:28,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520374636] [2022-11-16 11:21:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:28,072 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 [2022-11-16 11:21:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:28,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:28,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:21:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:28,480 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:21:28,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:21:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:28,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:28,539 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:28,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520374636] [2022-11-16 11:21:28,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520374636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:28,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:28,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334961852] [2022-11-16 11:21:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:28,542 INFO L87 Difference]: Start difference. First operand 4505 states and 18075 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) [2022-11-16 11:21:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:28,942 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-11-16 11:21:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:28,943 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 [2022-11-16 11:21:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:29,000 INFO L225 Difference]: With dead ends: 4505 [2022-11-16 11:21:29,000 INFO L226 Difference]: Without dead ends: 4505 [2022-11-16 11:21:29,001 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 [2022-11-16 11:21:29,006 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:29,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:21:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-11-16 11:21:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-11-16 11:21:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.485976669148672) internal successors, (18074), 4504 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-11-16 11:21:29,309 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-11-16 11:21:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:29,309 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-11-16 11:21:29,309 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) [2022-11-16 11:21:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-11-16 11:21:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:21:29,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:29,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:21:29,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:29,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 859364, now seen corresponding path program 1 times [2022-11-16 11:21:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696739097] [2022-11-16 11:21:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:29,512 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 [2022-11-16 11:21:29,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:29,513 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:21:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:29,910 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-11-16 11:21:29,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-11-16 11:21:29,967 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-16 11:21:29,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 11:21:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:30,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:30,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696739097] [2022-11-16 11:21:30,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696739097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:30,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:30,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868570881] [2022-11-16 11:21:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:30,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:30,154 INFO L87 Difference]: Start difference. First operand 4505 states and 18074 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) [2022-11-16 11:21:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:30,378 INFO L93 Difference]: Finished difference Result 4504 states and 18073 transitions. [2022-11-16 11:21:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:30,379 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 [2022-11-16 11:21:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:30,407 INFO L225 Difference]: With dead ends: 4504 [2022-11-16 11:21:30,407 INFO L226 Difference]: Without dead ends: 4504 [2022-11-16 11:21:30,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:30,410 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:30,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-16 11:21:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-11-16 11:21:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2022-11-16 11:21:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4029 states have (on average 4.485728468602631) internal successors, (18073), 4503 states have internal predecessors, (18073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 18073 transitions. [2022-11-16 11:21:30,641 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 18073 transitions. Word has length 3 [2022-11-16 11:21:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:30,642 INFO L495 AbstractCegarLoop]: Abstraction has 4504 states and 18073 transitions. [2022-11-16 11:21:30,642 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) [2022-11-16 11:21:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 18073 transitions. [2022-11-16 11:21:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:21:30,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:30,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:21:30,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:30,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 859365, now seen corresponding path program 1 times [2022-11-16 11:21:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:30,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091399977] [2022-11-16 11:21:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:30,858 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 [2022-11-16 11:21:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:30,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:30,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:21:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:31,122 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 11:21:31,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-16 11:21:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:31,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:31,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:31,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091399977] [2022-11-16 11:21:31,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091399977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:31,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:31,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:31,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461164549] [2022-11-16 11:21:31,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:31,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:31,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:31,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:31,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:31,287 INFO L87 Difference]: Start difference. First operand 4504 states and 18073 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) [2022-11-16 11:21:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:31,567 INFO L93 Difference]: Finished difference Result 4503 states and 18072 transitions. [2022-11-16 11:21:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:31,568 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 [2022-11-16 11:21:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:31,600 INFO L225 Difference]: With dead ends: 4503 [2022-11-16 11:21:31,601 INFO L226 Difference]: Without dead ends: 4503 [2022-11-16 11:21:31,601 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 [2022-11-16 11:21:31,602 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:31,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-16 11:21:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-11-16 11:21:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4503. [2022-11-16 11:21:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4029 states have (on average 4.485480268056589) internal successors, (18072), 4502 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 18072 transitions. [2022-11-16 11:21:31,807 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 18072 transitions. Word has length 3 [2022-11-16 11:21:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:31,808 INFO L495 AbstractCegarLoop]: Abstraction has 4503 states and 18072 transitions. [2022-11-16 11:21:31,808 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) [2022-11-16 11:21:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 18072 transitions. [2022-11-16 11:21:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:21:31,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:31,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:21:31,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:32,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:32,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:32,028 INFO L85 PathProgramCache]: Analyzing trace with hash 859269, now seen corresponding path program 1 times [2022-11-16 11:21:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:32,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668863289] [2022-11-16 11:21:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:32,029 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 [2022-11-16 11:21:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:32,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:32,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 11:21:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:21:32,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:32,392 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:21:32,392 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:21:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:32,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:32,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668863289] [2022-11-16 11:21:32,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668863289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:32,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:32,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:21:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756594861] [2022-11-16 11:21:32,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:21:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:21:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:21:32,758 INFO L87 Difference]: Start difference. First operand 4503 states and 18072 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:33,941 INFO L93 Difference]: Finished difference Result 9005 states and 36145 transitions. [2022-11-16 11:21:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:21:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:21:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:34,027 INFO L225 Difference]: With dead ends: 9005 [2022-11-16 11:21:34,028 INFO L226 Difference]: Without dead ends: 9005 [2022-11-16 11:21:34,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:21:34,029 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 213 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:34,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 9 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:21:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2022-11-16 11:21:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 4506. [2022-11-16 11:21:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4032 states have (on average 4.4836309523809526) internal successors, (18078), 4505 states have internal predecessors, (18078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18078 transitions. [2022-11-16 11:21:34,422 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18078 transitions. Word has length 3 [2022-11-16 11:21:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:34,422 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18078 transitions. [2022-11-16 11:21:34,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18078 transitions. [2022-11-16 11:21:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:21:34,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:34,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:21:34,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:34,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 825867783, now seen corresponding path program 1 times [2022-11-16 11:21:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794245194] [2022-11-16 11:21:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:34,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:34,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:34,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:34,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 11:21:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:21:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:34,958 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 11:21:34,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 11:21:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:35,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:35,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794245194] [2022-11-16 11:21:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794245194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:35,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:21:35,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85299382] [2022-11-16 11:21:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:35,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:21:35,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:21:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:21:35,016 INFO L87 Difference]: Start difference. First operand 4506 states and 18078 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:35,287 INFO L93 Difference]: Finished difference Result 2138 states and 8458 transitions. [2022-11-16 11:21:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:21:35,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:21:35,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:35,301 INFO L225 Difference]: With dead ends: 2138 [2022-11-16 11:21:35,301 INFO L226 Difference]: Without dead ends: 2138 [2022-11-16 11:21:35,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:21:35,303 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:35,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:21:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-11-16 11:21:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 2138. [2022-11-16 11:21:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2005 states have (on average 4.218453865336659) internal successors, (8458), 2137 states have internal predecessors, (8458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 8458 transitions. [2022-11-16 11:21:35,375 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 8458 transitions. Word has length 5 [2022-11-16 11:21:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:35,375 INFO L495 AbstractCegarLoop]: Abstraction has 2138 states and 8458 transitions. [2022-11-16 11:21:35,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 8458 transitions. [2022-11-16 11:21:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:21:35,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:35,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:21:35,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:35,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash 825867784, now seen corresponding path program 1 times [2022-11-16 11:21:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887640644] [2022-11-16 11:21:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:35,594 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 [2022-11-16 11:21:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:35,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:35,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:35,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:21:35,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:35,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:35,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:21:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:35,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:35,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887640644] [2022-11-16 11:21:35,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887640644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:35,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:35,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:21:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7520109] [2022-11-16 11:21:35,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:35,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:21:35,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:21:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:35,990 INFO L87 Difference]: Start difference. First operand 2138 states and 8458 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) [2022-11-16 11:21:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:36,757 INFO L93 Difference]: Finished difference Result 3053 states and 12001 transitions. [2022-11-16 11:21:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:21:36,758 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 5 [2022-11-16 11:21:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:36,775 INFO L225 Difference]: With dead ends: 3053 [2022-11-16 11:21:36,775 INFO L226 Difference]: Without dead ends: 3053 [2022-11-16 11:21:36,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:21:36,776 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 317 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:36,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 3 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:21:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-11-16 11:21:36,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 1530. [2022-11-16 11:21:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1463 states have (on average 4.105263157894737) internal successors, (6006), 1529 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 6006 transitions. [2022-11-16 11:21:36,845 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 6006 transitions. Word has length 5 [2022-11-16 11:21:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:36,845 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 6006 transitions. [2022-11-16 11:21:36,845 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) [2022-11-16 11:21:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 6006 transitions. [2022-11-16 11:21:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:21:36,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:36,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:21:36,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:21:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:37,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 825868011, now seen corresponding path program 1 times [2022-11-16 11:21:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:37,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189864333] [2022-11-16 11:21:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:37,061 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 [2022-11-16 11:21:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:37,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:37,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:37,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:21:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,456 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:21:37,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:21:37,526 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:21:37,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:21:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:38,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:38,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:38,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189864333] [2022-11-16 11:21:38,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189864333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:38,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:38,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:21:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682161349] [2022-11-16 11:21:38,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:21:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:21:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:38,419 INFO L87 Difference]: Start difference. First operand 1530 states and 6006 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) [2022-11-16 11:21:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:39,083 INFO L93 Difference]: Finished difference Result 1534 states and 6014 transitions. [2022-11-16 11:21:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:21:39,084 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 5 [2022-11-16 11:21:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:39,088 INFO L225 Difference]: With dead ends: 1534 [2022-11-16 11:21:39,089 INFO L226 Difference]: Without dead ends: 1534 [2022-11-16 11:21:39,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:39,089 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:39,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2022-11-16 11:21:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2022-11-16 11:21:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1532. [2022-11-16 11:21:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1465 states have (on average 4.102389078498294) internal successors, (6010), 1531 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 6010 transitions. [2022-11-16 11:21:39,131 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 6010 transitions. Word has length 5 [2022-11-16 11:21:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:39,132 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 6010 transitions. [2022-11-16 11:21:39,132 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) [2022-11-16 11:21:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 6010 transitions. [2022-11-16 11:21:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:21:39,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:39,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:21:39,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:39,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:39,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash 825868012, now seen corresponding path program 1 times [2022-11-16 11:21:39,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:39,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728761647] [2022-11-16 11:21:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:39,345 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 [2022-11-16 11:21:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:39,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 11:21:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:39,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:21:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:39,591 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 11:21:39,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-16 11:21:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:39,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:39,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:39,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728761647] [2022-11-16 11:21:39,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728761647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:39,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:39,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094007055] [2022-11-16 11:21:39,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:39,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:39,724 INFO L87 Difference]: Start difference. First operand 1532 states and 6010 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:39,871 INFO L93 Difference]: Finished difference Result 1531 states and 6007 transitions. [2022-11-16 11:21:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:21:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:39,876 INFO L225 Difference]: With dead ends: 1531 [2022-11-16 11:21:39,876 INFO L226 Difference]: Without dead ends: 1531 [2022-11-16 11:21:39,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:39,877 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:39,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-16 11:21:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-16 11:21:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2022-11-16 11:21:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1464 states have (on average 4.103142076502732) internal successors, (6007), 1530 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6007 transitions. [2022-11-16 11:21:39,918 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6007 transitions. Word has length 5 [2022-11-16 11:21:39,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:39,918 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 6007 transitions. [2022-11-16 11:21:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6007 transitions. [2022-11-16 11:21:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:21:39,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:39,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:21:39,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-16 11:21:40,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:40,130 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:40,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:40,131 INFO L85 PathProgramCache]: Analyzing trace with hash -167901648, now seen corresponding path program 1 times [2022-11-16 11:21:40,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:40,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536850005] [2022-11-16 11:21:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:40,131 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 [2022-11-16 11:21:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:40,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:21:40,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:40,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:40,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:40,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:40,477 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:21:40,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:21:40,509 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:21:40,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:21:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:41,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:41,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:41,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536850005] [2022-11-16 11:21:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536850005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:41,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:21:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661433253] [2022-11-16 11:21:41,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:41,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:21:41,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:21:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:41,364 INFO L87 Difference]: Start difference. First operand 1531 states and 6007 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-16 11:21:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:42,133 INFO L93 Difference]: Finished difference Result 1535 states and 6016 transitions. [2022-11-16 11:21:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:21:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 6 [2022-11-16 11:21:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:42,139 INFO L225 Difference]: With dead ends: 1535 [2022-11-16 11:21:42,139 INFO L226 Difference]: Without dead ends: 1535 [2022-11-16 11:21:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:21:42,140 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:42,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 8 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 79 Unchecked, 0.6s Time] [2022-11-16 11:21:42,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-11-16 11:21:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1532. [2022-11-16 11:21:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1465 states have (on average 4.102389078498294) internal successors, (6010), 1531 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 6010 transitions. [2022-11-16 11:21:42,195 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 6010 transitions. Word has length 6 [2022-11-16 11:21:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:42,195 INFO L495 AbstractCegarLoop]: Abstraction has 1532 states and 6010 transitions. [2022-11-16 11:21:42,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-16 11:21:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 6010 transitions. [2022-11-16 11:21:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:21:42,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:42,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:21:42,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:42,403 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -167901647, now seen corresponding path program 1 times [2022-11-16 11:21:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:42,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630072147] [2022-11-16 11:21:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:42,404 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 [2022-11-16 11:21:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:42,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:42,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 11:21:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:21:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:42,681 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 11:21:42,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-16 11:21:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:42,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:42,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:42,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630072147] [2022-11-16 11:21:42,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630072147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:42,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:42,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:42,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606540025] [2022-11-16 11:21:42,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:42,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:42,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:42,977 INFO L87 Difference]: Start difference. First operand 1532 states and 6010 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) [2022-11-16 11:21:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:43,113 INFO L93 Difference]: Finished difference Result 1531 states and 6007 transitions. [2022-11-16 11:21:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:43,114 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 [2022-11-16 11:21:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:43,120 INFO L225 Difference]: With dead ends: 1531 [2022-11-16 11:21:43,120 INFO L226 Difference]: Without dead ends: 1531 [2022-11-16 11:21:43,121 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 [2022-11-16 11:21:43,121 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:43,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-16 11:21:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-11-16 11:21:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1531. [2022-11-16 11:21:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1464 states have (on average 4.103142076502732) internal successors, (6007), 1530 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 6007 transitions. [2022-11-16 11:21:43,165 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 6007 transitions. Word has length 6 [2022-11-16 11:21:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:43,165 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 6007 transitions. [2022-11-16 11:21:43,165 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) [2022-11-16 11:21:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 6007 transitions. [2022-11-16 11:21:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:21:43,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:43,166 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:21:43,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:43,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:43,378 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash -168662736, now seen corresponding path program 2 times [2022-11-16 11:21:43,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:43,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360465797] [2022-11-16 11:21:43,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:43,380 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 [2022-11-16 11:21:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:43,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:43,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 11:21:43,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:21:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:21:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:43,726 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:21:43,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:21:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:43,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:44,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:44,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360465797] [2022-11-16 11:21:44,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360465797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:44,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:44,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:21:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865715884] [2022-11-16 11:21:44,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:21:44,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:21:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:21:44,652 INFO L87 Difference]: Start difference. First operand 1531 states and 6007 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-16 11:21:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:51,049 INFO L93 Difference]: Finished difference Result 13698 states and 53934 transitions. [2022-11-16 11:21:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:21:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-11-16 11:21:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:51,103 INFO L225 Difference]: With dead ends: 13698 [2022-11-16 11:21:51,103 INFO L226 Difference]: Without dead ends: 13698 [2022-11-16 11:21:51,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:21:51,103 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1242 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:51,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 24 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-16 11:21:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2022-11-16 11:21:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 1537. [2022-11-16 11:21:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1470 states have (on average 4.094557823129252) internal successors, (6019), 1536 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 6019 transitions. [2022-11-16 11:21:51,258 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 6019 transitions. Word has length 6 [2022-11-16 11:21:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:51,258 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 6019 transitions. [2022-11-16 11:21:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-16 11:21:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 6019 transitions. [2022-11-16 11:21:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:51,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:51,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:51,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:51,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -909985300, now seen corresponding path program 1 times [2022-11-16 11:21:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069375691] [2022-11-16 11:21:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:51,477 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 [2022-11-16 11:21:51,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:51,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:51,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:21:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:51,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:51,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:51,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069375691] [2022-11-16 11:21:51,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069375691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:51,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:51,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:21:51,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100572464] [2022-11-16 11:21:51,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:51,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:21:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:21:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:21:51,654 INFO L87 Difference]: Start difference. First operand 1537 states and 6019 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-16 11:21:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:52,273 INFO L93 Difference]: Finished difference Result 2303 states and 8959 transitions. [2022-11-16 11:21:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:21:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-11-16 11:21:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:52,285 INFO L225 Difference]: With dead ends: 2303 [2022-11-16 11:21:52,285 INFO L226 Difference]: Without dead ends: 2303 [2022-11-16 11:21:52,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:21:52,286 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 211 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:52,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 6 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:21:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-11-16 11:21:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1801. [2022-11-16 11:21:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.239331026528259) internal successors, (7351), 1800 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7351 transitions. [2022-11-16 11:21:52,363 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7351 transitions. Word has length 7 [2022-11-16 11:21:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:52,364 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7351 transitions. [2022-11-16 11:21:52,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-11-16 11:21:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7351 transitions. [2022-11-16 11:21:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:52,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:52,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:52,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:52,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:52,577 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -909985200, now seen corresponding path program 1 times [2022-11-16 11:21:52,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:52,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778415504] [2022-11-16 11:21:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:52,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:52,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:52,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:52,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:21:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:52,953 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:21:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:21:52,986 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:21:52,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:21:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:53,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:53,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778415504] [2022-11-16 11:21:53,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778415504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:53,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:53,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:21:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888175077] [2022-11-16 11:21:53,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:21:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:21:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:53,890 INFO L87 Difference]: Start difference. First operand 1801 states and 7351 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:54,028 INFO L93 Difference]: Finished difference Result 1806 states and 7364 transitions. [2022-11-16 11:21:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:21:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 11:21:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:54,034 INFO L225 Difference]: With dead ends: 1806 [2022-11-16 11:21:54,035 INFO L226 Difference]: Without dead ends: 1806 [2022-11-16 11:21:54,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:54,036 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:54,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-11-16 11:21:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-16 11:21:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1802. [2022-11-16 11:21:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1735 states have (on average 4.239193083573487) internal successors, (7355), 1801 states have internal predecessors, (7355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 7355 transitions. [2022-11-16 11:21:54,131 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 7355 transitions. Word has length 7 [2022-11-16 11:21:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:54,132 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 7355 transitions. [2022-11-16 11:21:54,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 7355 transitions. [2022-11-16 11:21:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:54,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:54,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:54,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:54,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:54,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash -909985199, now seen corresponding path program 1 times [2022-11-16 11:21:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224494605] [2022-11-16 11:21:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:54,357 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 [2022-11-16 11:21:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:54,359 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:54,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:21:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:54,622 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 11:21:54,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-16 11:21:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:54,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:54,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:54,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224494605] [2022-11-16 11:21:54,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224494605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:54,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:54,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:54,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73046160] [2022-11-16 11:21:54,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:54,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:54,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:54,845 INFO L87 Difference]: Start difference. First operand 1802 states and 7355 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:55,004 INFO L93 Difference]: Finished difference Result 1801 states and 7351 transitions. [2022-11-16 11:21:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:55,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:21:55,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:55,015 INFO L225 Difference]: With dead ends: 1801 [2022-11-16 11:21:55,016 INFO L226 Difference]: Without dead ends: 1801 [2022-11-16 11:21:55,016 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 [2022-11-16 11:21:55,017 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:55,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 11:21:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-16 11:21:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1801. [2022-11-16 11:21:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.239331026528259) internal successors, (7351), 1800 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7351 transitions. [2022-11-16 11:21:55,092 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7351 transitions. Word has length 7 [2022-11-16 11:21:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:55,092 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7351 transitions. [2022-11-16 11:21:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7351 transitions. [2022-11-16 11:21:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:55,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:55,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:55,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:55,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:55,306 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash -909772099, now seen corresponding path program 1 times [2022-11-16 11:21:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:55,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046195406] [2022-11-16 11:21:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:55,307 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 [2022-11-16 11:21:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:55,310 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:55,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:21:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:55,590 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 11:21:55,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-16 11:21:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:55,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:55,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:55,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046195406] [2022-11-16 11:21:55,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046195406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:55,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:55,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849850016] [2022-11-16 11:21:55,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:55,882 INFO L87 Difference]: Start difference. First operand 1801 states and 7351 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:56,023 INFO L93 Difference]: Finished difference Result 1800 states and 7348 transitions. [2022-11-16 11:21:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:21:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:56,032 INFO L225 Difference]: With dead ends: 1800 [2022-11-16 11:21:56,032 INFO L226 Difference]: Without dead ends: 1800 [2022-11-16 11:21:56,032 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 [2022-11-16 11:21:56,033 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:56,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 11:21:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-11-16 11:21:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1800. [2022-11-16 11:21:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1733 states have (on average 4.2400461627236) internal successors, (7348), 1799 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 7348 transitions. [2022-11-16 11:21:56,099 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 7348 transitions. Word has length 7 [2022-11-16 11:21:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:56,099 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 7348 transitions. [2022-11-16 11:21:56,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 7348 transitions. [2022-11-16 11:21:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:56,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:56,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:56,314 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:56,314 INFO L85 PathProgramCache]: Analyzing trace with hash -909772097, now seen corresponding path program 1 times [2022-11-16 11:21:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459885291] [2022-11-16 11:21:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:56,315 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 [2022-11-16 11:21:56,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:56,316 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:56,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:21:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:56,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:56,689 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:21:56,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:21:56,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:21:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:57,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:57,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459885291] [2022-11-16 11:21:57,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459885291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:57,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:57,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:21:57,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214632004] [2022-11-16 11:21:57,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:57,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:21:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:21:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:57,389 INFO L87 Difference]: Start difference. First operand 1800 states and 7348 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:58,018 INFO L93 Difference]: Finished difference Result 1806 states and 7361 transitions. [2022-11-16 11:21:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:21:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-16 11:21:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:58,025 INFO L225 Difference]: With dead ends: 1806 [2022-11-16 11:21:58,025 INFO L226 Difference]: Without dead ends: 1806 [2022-11-16 11:21:58,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:21:58,026 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:58,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2022-11-16 11:21:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-11-16 11:21:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1802. [2022-11-16 11:21:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1735 states have (on average 4.238040345821326) internal successors, (7353), 1801 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 7353 transitions. [2022-11-16 11:21:58,097 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 7353 transitions. Word has length 7 [2022-11-16 11:21:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:58,097 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 7353 transitions. [2022-11-16 11:21:58,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 7353 transitions. [2022-11-16 11:21:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:21:58,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:58,099 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 11:21:58,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:58,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:58,311 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -933550005, now seen corresponding path program 2 times [2022-11-16 11:21:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538047243] [2022-11-16 11:21:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:58,313 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:58,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:58,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:21:58,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:21:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:58,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:58,632 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-16 11:21:58,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-16 11:21:58,688 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 11:21:58,688 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 308 treesize of output 303 [2022-11-16 11:21:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:21:58,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:58,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538047243] [2022-11-16 11:21:58,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538047243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:58,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:58,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:21:58,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710311953] [2022-11-16 11:21:58,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:58,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:21:58,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:21:58,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:21:58,909 INFO L87 Difference]: Start difference. First operand 1802 states and 7353 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:59,055 INFO L93 Difference]: Finished difference Result 1801 states and 7351 transitions. [2022-11-16 11:21:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:21:59,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:21:59,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:59,062 INFO L225 Difference]: With dead ends: 1801 [2022-11-16 11:21:59,062 INFO L226 Difference]: Without dead ends: 1801 [2022-11-16 11:21:59,063 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 [2022-11-16 11:21:59,063 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:59,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 11:21:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-16 11:21:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1801. [2022-11-16 11:21:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.239331026528259) internal successors, (7351), 1800 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7351 transitions. [2022-11-16 11:21:59,115 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7351 transitions. Word has length 7 [2022-11-16 11:21:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:59,115 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7351 transitions. [2022-11-16 11:21:59,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7351 transitions. [2022-11-16 11:21:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:21:59,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:59,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:59,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:59,319 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:21:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230045, now seen corresponding path program 1 times [2022-11-16 11:21:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462311824] [2022-11-16 11:21:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:59,320 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 [2022-11-16 11:21:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:59,321 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:21:59,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:21:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:21:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:21:59,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:59,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:59,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462311824] [2022-11-16 11:21:59,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462311824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:59,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:59,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:21:59,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497847319] [2022-11-16 11:21:59,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:21:59,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:21:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:21:59,527 INFO L87 Difference]: Start difference. First operand 1801 states and 7351 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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) [2022-11-16 11:21:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:59,886 INFO L93 Difference]: Finished difference Result 1801 states and 7087 transitions. [2022-11-16 11:21:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:21:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2022-11-16 11:21:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:59,896 INFO L225 Difference]: With dead ends: 1801 [2022-11-16 11:21:59,896 INFO L226 Difference]: Without dead ends: 1801 [2022-11-16 11:21:59,896 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 [2022-11-16 11:21:59,898 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 69 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:59,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 3 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:21:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-16 11:21:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1801. [2022-11-16 11:21:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1734 states have (on average 4.087081891580161) internal successors, (7087), 1800 states have internal predecessors, (7087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 7087 transitions. [2022-11-16 11:21:59,972 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 7087 transitions. Word has length 8 [2022-11-16 11:21:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:59,973 INFO L495 AbstractCegarLoop]: Abstraction has 1801 states and 7087 transitions. [2022-11-16 11:21:59,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2022-11-16 11:21:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 7087 transitions. [2022-11-16 11:21:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:21:59,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:59,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:59,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:00,191 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230162, now seen corresponding path program 1 times [2022-11-16 11:22:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126659499] [2022-11-16 11:22:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:00,192 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 [2022-11-16 11:22:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:00,193 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:00,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:00,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:00,562 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:22:00,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:22:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:00,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:01,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:01,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126659499] [2022-11-16 11:22:01,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126659499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:01,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:01,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:22:01,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280416597] [2022-11-16 11:22:01,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:01,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:22:01,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:01,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:22:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:01,182 INFO L87 Difference]: Start difference. First operand 1801 states and 7087 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:03,345 INFO L93 Difference]: Finished difference Result 3059 states and 12541 transitions. [2022-11-16 11:22:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:22:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 11:22:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:03,360 INFO L225 Difference]: With dead ends: 3059 [2022-11-16 11:22:03,360 INFO L226 Difference]: Without dead ends: 3059 [2022-11-16 11:22:03,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:22:03,361 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 333 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:03,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 9 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 11:22:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2022-11-16 11:22:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2593. [2022-11-16 11:22:03,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2526 states have (on average 4.38756927949327) internal successors, (11083), 2592 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 11083 transitions. [2022-11-16 11:22:03,454 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 11083 transitions. Word has length 8 [2022-11-16 11:22:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:03,454 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 11083 transitions. [2022-11-16 11:22:03,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 11083 transitions. [2022-11-16 11:22:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:03,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:03,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:03,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:03,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:03,667 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230262, now seen corresponding path program 1 times [2022-11-16 11:22:03,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:03,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366720255] [2022-11-16 11:22:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:03,668 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 [2022-11-16 11:22:03,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:03,669 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:03,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:03,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:22:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:03,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:04,022 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:22:04,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:22:04,052 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:22:04,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:22:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:04,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:04,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366720255] [2022-11-16 11:22:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366720255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:04,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198834573] [2022-11-16 11:22:04,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:04,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:04,928 INFO L87 Difference]: Start difference. First operand 2593 states and 11083 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:05,467 INFO L93 Difference]: Finished difference Result 2605 states and 11124 transitions. [2022-11-16 11:22:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:05,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 11:22:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:05,476 INFO L225 Difference]: With dead ends: 2605 [2022-11-16 11:22:05,476 INFO L226 Difference]: Without dead ends: 2605 [2022-11-16 11:22:05,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:05,477 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:05,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 8 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2022-11-16 11:22:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-11-16 11:22:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2597. [2022-11-16 11:22:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2530 states have (on average 4.387351778656127) internal successors, (11100), 2596 states have internal predecessors, (11100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11100 transitions. [2022-11-16 11:22:05,535 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11100 transitions. Word has length 8 [2022-11-16 11:22:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:05,535 INFO L495 AbstractCegarLoop]: Abstraction has 2597 states and 11100 transitions. [2022-11-16 11:22:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11100 transitions. [2022-11-16 11:22:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:05,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:05,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:05,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-16 11:22:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:05,737 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1855230263, now seen corresponding path program 1 times [2022-11-16 11:22:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:05,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026383929] [2022-11-16 11:22:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:05,737 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 [2022-11-16 11:22:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:05,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:22:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:06,015 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 11:22:06,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-16 11:22:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:06,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:06,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026383929] [2022-11-16 11:22:06,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026383929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:06,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:06,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835415533] [2022-11-16 11:22:06,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:06,197 INFO L87 Difference]: Start difference. First operand 2597 states and 11100 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:06,327 INFO L93 Difference]: Finished difference Result 2593 states and 11083 transitions. [2022-11-16 11:22:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:22:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:06,336 INFO L225 Difference]: With dead ends: 2593 [2022-11-16 11:22:06,336 INFO L226 Difference]: Without dead ends: 2593 [2022-11-16 11:22:06,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:06,337 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:06,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 11:22:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-11-16 11:22:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2593. [2022-11-16 11:22:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2526 states have (on average 4.38756927949327) internal successors, (11083), 2592 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 11083 transitions. [2022-11-16 11:22:06,406 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 11083 transitions. Word has length 8 [2022-11-16 11:22:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 11083 transitions. [2022-11-16 11:22:06,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 11083 transitions. [2022-11-16 11:22:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:06,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:06,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:06,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:06,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1855292610, now seen corresponding path program 1 times [2022-11-16 11:22:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:06,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338196695] [2022-11-16 11:22:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:06,621 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:06,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 11:22:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:22:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:06,944 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 11:22:06,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-16 11:22:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:07,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:07,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:07,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338196695] [2022-11-16 11:22:07,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338196695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:07,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:07,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336825009] [2022-11-16 11:22:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:07,302 INFO L87 Difference]: Start difference. First operand 2593 states and 11083 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:07,442 INFO L93 Difference]: Finished difference Result 2592 states and 11080 transitions. [2022-11-16 11:22:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:22:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:07,452 INFO L225 Difference]: With dead ends: 2592 [2022-11-16 11:22:07,452 INFO L226 Difference]: Without dead ends: 2592 [2022-11-16 11:22:07,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:07,453 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:07,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 11:22:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-11-16 11:22:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2592. [2022-11-16 11:22:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2525 states have (on average 4.3881188118811885) internal successors, (11080), 2591 states have internal predecessors, (11080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 11080 transitions. [2022-11-16 11:22:07,527 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 11080 transitions. Word has length 8 [2022-11-16 11:22:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:07,527 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 11080 transitions. [2022-11-16 11:22:07,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 11080 transitions. [2022-11-16 11:22:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:07,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:07,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:07,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:07,735 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1855292612, now seen corresponding path program 1 times [2022-11-16 11:22:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:07,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559939073] [2022-11-16 11:22:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:07,736 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 [2022-11-16 11:22:07,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:07,737 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:07,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 11:22:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:07,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:08,117 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:08,117 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:08,142 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 282 treesize of output 266 [2022-11-16 11:22:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:08,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:08,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:08,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559939073] [2022-11-16 11:22:08,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559939073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:08,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:08,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:08,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126424970] [2022-11-16 11:22:08,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:08,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:08,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:08,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:08,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:08,748 INFO L87 Difference]: Start difference. First operand 2592 states and 11080 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:09,453 INFO L93 Difference]: Finished difference Result 2601 states and 11100 transitions. [2022-11-16 11:22:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:22:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 11:22:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:09,461 INFO L225 Difference]: With dead ends: 2601 [2022-11-16 11:22:09,461 INFO L226 Difference]: Without dead ends: 2601 [2022-11-16 11:22:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:22:09,462 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:09,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-16 11:22:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2022-11-16 11:22:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2594. [2022-11-16 11:22:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2527 states have (on average 4.386624455876533) internal successors, (11085), 2593 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 11085 transitions. [2022-11-16 11:22:09,530 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 11085 transitions. Word has length 8 [2022-11-16 11:22:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:09,531 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 11085 transitions. [2022-11-16 11:22:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 11085 transitions. [2022-11-16 11:22:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:09,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:09,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:09,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:09,745 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1861830138, now seen corresponding path program 1 times [2022-11-16 11:22:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:09,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635283604] [2022-11-16 11:22:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:09,745 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 [2022-11-16 11:22:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:09,746 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:09,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:22:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:10,022 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-16 11:22:10,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 55 [2022-11-16 11:22:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:10,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:10,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:10,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635283604] [2022-11-16 11:22:10,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635283604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:10,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:10,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:10,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364427560] [2022-11-16 11:22:10,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:10,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:10,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:10,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:10,069 INFO L87 Difference]: Start difference. First operand 2594 states and 11085 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:10,258 INFO L93 Difference]: Finished difference Result 2543 states and 10921 transitions. [2022-11-16 11:22:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:22:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:10,270 INFO L225 Difference]: With dead ends: 2543 [2022-11-16 11:22:10,270 INFO L226 Difference]: Without dead ends: 2543 [2022-11-16 11:22:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:10,271 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:10,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:22:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-11-16 11:22:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2543. [2022-11-16 11:22:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2482 states have (on average 4.400080580177276) internal successors, (10921), 2542 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 10921 transitions. [2022-11-16 11:22:10,328 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 10921 transitions. Word has length 8 [2022-11-16 11:22:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:10,328 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 10921 transitions. [2022-11-16 11:22:10,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 10921 transitions. [2022-11-16 11:22:10,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:10,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:10,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:10,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:10,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:10,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1861830140, now seen corresponding path program 1 times [2022-11-16 11:22:10,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:10,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817650310] [2022-11-16 11:22:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:10,531 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 [2022-11-16 11:22:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:10,532 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:10,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 11:22:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:10,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:11,004 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:11,004 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:11,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 252 [2022-11-16 11:22:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:11,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:11,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:11,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817650310] [2022-11-16 11:22:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817650310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:11,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:11,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138653442] [2022-11-16 11:22:11,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:11,713 INFO L87 Difference]: Start difference. First operand 2543 states and 10921 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:12,302 INFO L93 Difference]: Finished difference Result 2549 states and 10935 transitions. [2022-11-16 11:22:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-16 11:22:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:12,310 INFO L225 Difference]: With dead ends: 2549 [2022-11-16 11:22:12,310 INFO L226 Difference]: Without dead ends: 2549 [2022-11-16 11:22:12,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:12,311 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:12,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 103 Unchecked, 0.6s Time] [2022-11-16 11:22:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-11-16 11:22:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2544. [2022-11-16 11:22:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2483 states have (on average 4.399516713652839) internal successors, (10924), 2543 states have internal predecessors, (10924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 10924 transitions. [2022-11-16 11:22:12,362 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 10924 transitions. Word has length 8 [2022-11-16 11:22:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:12,362 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 10924 transitions. [2022-11-16 11:22:12,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 10924 transitions. [2022-11-16 11:22:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:22:12,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:12,363 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-16 11:22:12,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:12,576 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1124714704, now seen corresponding path program 2 times [2022-11-16 11:22:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:12,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517500327] [2022-11-16 11:22:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:12,577 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 [2022-11-16 11:22:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:12,578 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:12,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 11:22:12,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:22:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:12,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:12,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:12,921 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:22:12,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:22:12,959 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:22:12,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:22:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:13,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:13,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517500327] [2022-11-16 11:22:13,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517500327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:13,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:13,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:13,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550891842] [2022-11-16 11:22:13,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:13,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:13,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:13,169 INFO L87 Difference]: Start difference. First operand 2544 states and 10924 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:13,313 INFO L93 Difference]: Finished difference Result 2543 states and 10922 transitions. [2022-11-16 11:22:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:22:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:13,321 INFO L225 Difference]: With dead ends: 2543 [2022-11-16 11:22:13,321 INFO L226 Difference]: Without dead ends: 2543 [2022-11-16 11:22:13,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:13,322 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:13,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-16 11:22:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-11-16 11:22:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2543. [2022-11-16 11:22:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2482 states have (on average 4.400483481063659) internal successors, (10922), 2542 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 10922 transitions. [2022-11-16 11:22:13,375 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 10922 transitions. Word has length 8 [2022-11-16 11:22:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:13,375 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 10922 transitions. [2022-11-16 11:22:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 10922 transitions. [2022-11-16 11:22:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:13,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:13,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:13,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-16 11:22:13,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:13,577 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1677570276, now seen corresponding path program 1 times [2022-11-16 11:22:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:13,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397016529] [2022-11-16 11:22:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:13,578 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 [2022-11-16 11:22:13,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:13,579 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:13,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:13,996 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:13,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:14,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:14,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:14,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397016529] [2022-11-16 11:22:14,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397016529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:14,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:14,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:14,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028253443] [2022-11-16 11:22:14,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:14,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:14,719 INFO L87 Difference]: Start difference. First operand 2543 states and 10922 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:15,198 INFO L93 Difference]: Finished difference Result 2555 states and 10949 transitions. [2022-11-16 11:22:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:22:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:22:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:15,212 INFO L225 Difference]: With dead ends: 2555 [2022-11-16 11:22:15,212 INFO L226 Difference]: Without dead ends: 2555 [2022-11-16 11:22:15,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:15,213 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:15,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-16 11:22:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2022-11-16 11:22:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2545. [2022-11-16 11:22:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2484 states have (on average 4.398953301127214) internal successors, (10927), 2544 states have internal predecessors, (10927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 10927 transitions. [2022-11-16 11:22:15,298 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 10927 transitions. Word has length 9 [2022-11-16 11:22:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:15,298 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 10927 transitions. [2022-11-16 11:22:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 10927 transitions. [2022-11-16 11:22:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:15,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:15,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:15,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:15,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:15,512 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1677563447, now seen corresponding path program 1 times [2022-11-16 11:22:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189333994] [2022-11-16 11:22:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:15,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:15,514 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:15,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:22:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:15,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:15,901 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-16 11:22:15,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-16 11:22:15,946 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 11:22:15,947 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 156 treesize of output 155 [2022-11-16 11:22:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:17,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:17,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189333994] [2022-11-16 11:22:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189333994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:17,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:17,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:22:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433691657] [2022-11-16 11:22:17,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:22:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:22:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:17,135 INFO L87 Difference]: Start difference. First operand 2545 states and 10927 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:18,083 INFO L93 Difference]: Finished difference Result 2802 states and 11717 transitions. [2022-11-16 11:22:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:22:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:22:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:18,092 INFO L225 Difference]: With dead ends: 2802 [2022-11-16 11:22:18,093 INFO L226 Difference]: Without dead ends: 2802 [2022-11-16 11:22:18,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:18,093 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:18,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 14 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 71 Unchecked, 0.9s Time] [2022-11-16 11:22:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2022-11-16 11:22:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2544. [2022-11-16 11:22:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2483 states have (on average 4.399516713652839) internal successors, (10924), 2543 states have internal predecessors, (10924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 10924 transitions. [2022-11-16 11:22:18,149 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 10924 transitions. Word has length 9 [2022-11-16 11:22:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:18,149 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 10924 transitions. [2022-11-16 11:22:18,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 10924 transitions. [2022-11-16 11:22:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:18,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:18,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:18,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:18,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:18,351 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1677563448, now seen corresponding path program 1 times [2022-11-16 11:22:18,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365250261] [2022-11-16 11:22:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:18,352 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 [2022-11-16 11:22:18,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:18,353 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:18,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:18,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:22:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:18,678 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 11:22:18,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-16 11:22:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:22:19,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:19,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365250261] [2022-11-16 11:22:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365250261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:19,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:19,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665834070] [2022-11-16 11:22:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:19,112 INFO L87 Difference]: Start difference. First operand 2544 states and 10924 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:19,233 INFO L93 Difference]: Finished difference Result 2543 states and 10922 transitions. [2022-11-16 11:22:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:22:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:19,241 INFO L225 Difference]: With dead ends: 2543 [2022-11-16 11:22:19,241 INFO L226 Difference]: Without dead ends: 2543 [2022-11-16 11:22:19,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:19,242 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:19,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 11:22:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-11-16 11:22:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2543. [2022-11-16 11:22:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2483 states have (on average 4.398711236407571) internal successors, (10922), 2542 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 10922 transitions. [2022-11-16 11:22:19,293 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 10922 transitions. Word has length 9 [2022-11-16 11:22:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:19,294 INFO L495 AbstractCegarLoop]: Abstraction has 2543 states and 10922 transitions. [2022-11-16 11:22:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 10922 transitions. [2022-11-16 11:22:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:19,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:19,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:19,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:19,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:19,499 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:19,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1679490199, now seen corresponding path program 1 times [2022-11-16 11:22:19,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:19,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149802306] [2022-11-16 11:22:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:19,499 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 [2022-11-16 11:22:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:19,500 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:19,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 11:22:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:22:19,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:19,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:19,862 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:19,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:20,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:20,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149802306] [2022-11-16 11:22:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149802306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:20,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309547343] [2022-11-16 11:22:20,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:20,509 INFO L87 Difference]: Start difference. First operand 2543 states and 10922 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:20,992 INFO L93 Difference]: Finished difference Result 2553 states and 10946 transitions. [2022-11-16 11:22:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:22:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:21,001 INFO L225 Difference]: With dead ends: 2553 [2022-11-16 11:22:21,001 INFO L226 Difference]: Without dead ends: 2553 [2022-11-16 11:22:21,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:21,002 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:21,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 9 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 102 Unchecked, 0.5s Time] [2022-11-16 11:22:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-11-16 11:22:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2544. [2022-11-16 11:22:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2484 states have (on average 4.398148148148148) internal successors, (10925), 2543 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 10925 transitions. [2022-11-16 11:22:21,053 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 10925 transitions. Word has length 9 [2022-11-16 11:22:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:21,053 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 10925 transitions. [2022-11-16 11:22:21,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 10925 transitions. [2022-11-16 11:22:21,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:21,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:21,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:21,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-16 11:22:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:21,254 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1882362448, now seen corresponding path program 1 times [2022-11-16 11:22:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:21,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240848474] [2022-11-16 11:22:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:21,255 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 [2022-11-16 11:22:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:21,256 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:21,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 11:22:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:21,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:22:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:21,665 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:22:21,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:22:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:21,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:22,185 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:22,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240848474] [2022-11-16 11:22:22,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240848474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:22,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:22,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:22,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462615850] [2022-11-16 11:22:22,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:22,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:22,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:22,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:22,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:22,187 INFO L87 Difference]: Start difference. First operand 2544 states and 10925 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:22,969 INFO L93 Difference]: Finished difference Result 5364 states and 22976 transitions. [2022-11-16 11:22:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:22:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:22,988 INFO L225 Difference]: With dead ends: 5364 [2022-11-16 11:22:22,988 INFO L226 Difference]: Without dead ends: 5364 [2022-11-16 11:22:22,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:22:22,989 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 108 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:22,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 7 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 151 Unchecked, 0.7s Time] [2022-11-16 11:22:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2022-11-16 11:22:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 2816. [2022-11-16 11:22:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2757 states have (on average 4.435255712731229) internal successors, (12228), 2815 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 12228 transitions. [2022-11-16 11:22:23,070 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 12228 transitions. Word has length 9 [2022-11-16 11:22:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 12228 transitions. [2022-11-16 11:22:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 12228 transitions. [2022-11-16 11:22:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:23,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:23,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:23,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-16 11:22:23,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:23,272 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1882362449, now seen corresponding path program 1 times [2022-11-16 11:22:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:23,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618015723] [2022-11-16 11:22:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:23,273 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 [2022-11-16 11:22:23,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:23,274 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:23,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:22:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:23,583 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 11:22:23,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2022-11-16 11:22:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:23,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:23,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618015723] [2022-11-16 11:22:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618015723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:23,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119930430] [2022-11-16 11:22:23,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:23,624 INFO L87 Difference]: Start difference. First operand 2816 states and 12228 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:23,789 INFO L93 Difference]: Finished difference Result 2634 states and 11265 transitions. [2022-11-16 11:22:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:22:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:23,798 INFO L225 Difference]: With dead ends: 2634 [2022-11-16 11:22:23,798 INFO L226 Difference]: Without dead ends: 2634 [2022-11-16 11:22:23,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:23,799 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:23,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:22:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-11-16 11:22:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2634. [2022-11-16 11:22:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2584 states have (on average 4.359520123839009) internal successors, (11265), 2633 states have internal predecessors, (11265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 11265 transitions. [2022-11-16 11:22:23,853 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 11265 transitions. Word has length 9 [2022-11-16 11:22:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:23,853 INFO L495 AbstractCegarLoop]: Abstraction has 2634 states and 11265 transitions. [2022-11-16 11:22:23,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 11265 transitions. [2022-11-16 11:22:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:23,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:23,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:23,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:24,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:24,055 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1882157783, now seen corresponding path program 1 times [2022-11-16 11:22:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:24,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063930206] [2022-11-16 11:22:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:24,056 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 [2022-11-16 11:22:24,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:24,057 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:24,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:24,461 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:24,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:24,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:24,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:25,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:25,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063930206] [2022-11-16 11:22:25,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063930206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:25,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:25,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132767763] [2022-11-16 11:22:25,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:25,085 INFO L87 Difference]: Start difference. First operand 2634 states and 11265 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:25,513 INFO L93 Difference]: Finished difference Result 2641 states and 11286 transitions. [2022-11-16 11:22:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:25,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-16 11:22:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:25,521 INFO L225 Difference]: With dead ends: 2641 [2022-11-16 11:22:25,522 INFO L226 Difference]: Without dead ends: 2641 [2022-11-16 11:22:25,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:25,522 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:25,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-11-16 11:22:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2022-11-16 11:22:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2635. [2022-11-16 11:22:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2585 states have (on average 4.359767891682785) internal successors, (11270), 2634 states have internal predecessors, (11270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 11270 transitions. [2022-11-16 11:22:25,574 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 11270 transitions. Word has length 9 [2022-11-16 11:22:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:25,574 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 11270 transitions. [2022-11-16 11:22:25,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 11270 transitions. [2022-11-16 11:22:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:25,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:25,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:25,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:25,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:25,776 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1882157661, now seen corresponding path program 1 times [2022-11-16 11:22:25,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543127953] [2022-11-16 11:22:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:25,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:25,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:25,777 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:25,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:22:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:25,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:25,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:25,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543127953] [2022-11-16 11:22:25,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543127953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:25,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:25,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:22:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642089035] [2022-11-16 11:22:25,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:25,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:22:25,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:22:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:25,987 INFO L87 Difference]: Start difference. First operand 2635 states and 11270 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-16 11:22:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:26,440 INFO L93 Difference]: Finished difference Result 3718 states and 15912 transitions. [2022-11-16 11:22:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:22:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 [2022-11-16 11:22:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:26,451 INFO L225 Difference]: With dead ends: 3718 [2022-11-16 11:22:26,451 INFO L226 Difference]: Without dead ends: 3718 [2022-11-16 11:22:26,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:22:26,452 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 143 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:26,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 5 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:22:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-16 11:22:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3143. [2022-11-16 11:22:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3093 states have (on average 4.522470093760104) internal successors, (13988), 3142 states have internal predecessors, (13988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 13988 transitions. [2022-11-16 11:22:26,521 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 13988 transitions. Word has length 9 [2022-11-16 11:22:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:26,521 INFO L495 AbstractCegarLoop]: Abstraction has 3143 states and 13988 transitions. [2022-11-16 11:22:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-16 11:22:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 13988 transitions. [2022-11-16 11:22:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:22:26,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:26,523 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:26,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:26,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:26,725 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 506629151, now seen corresponding path program 2 times [2022-11-16 11:22:26,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586620477] [2022-11-16 11:22:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:26,726 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 [2022-11-16 11:22:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:26,727 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 11:22:26,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:22:26,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:27,079 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:27,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:27,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:27,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:27,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586620477] [2022-11-16 11:22:27,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586620477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:27,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:27,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:22:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546077065] [2022-11-16 11:22:27,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:27,316 INFO L87 Difference]: Start difference. First operand 3143 states and 13988 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:27,453 INFO L93 Difference]: Finished difference Result 3142 states and 13985 transitions. [2022-11-16 11:22:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:22:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:27,463 INFO L225 Difference]: With dead ends: 3142 [2022-11-16 11:22:27,463 INFO L226 Difference]: Without dead ends: 3142 [2022-11-16 11:22:27,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:27,464 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:27,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-16 11:22:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2022-11-16 11:22:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3142. [2022-11-16 11:22:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3092 states have (on average 4.522962483829237) internal successors, (13985), 3141 states have internal predecessors, (13985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 13985 transitions. [2022-11-16 11:22:27,530 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 13985 transitions. Word has length 9 [2022-11-16 11:22:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:27,531 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 13985 transitions. [2022-11-16 11:22:27,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 13985 transitions. [2022-11-16 11:22:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:27,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:27,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:27,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:27,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:27,734 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:27,735 INFO L85 PathProgramCache]: Analyzing trace with hash 465218994, now seen corresponding path program 1 times [2022-11-16 11:22:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:27,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771101940] [2022-11-16 11:22:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:27,735 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 [2022-11-16 11:22:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:27,736 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:27,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 11:22:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:27,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:28,186 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:28,186 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:28,209 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 147 treesize of output 143 [2022-11-16 11:22:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:28,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:28,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771101940] [2022-11-16 11:22:28,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771101940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:28,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:28,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:28,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603308714] [2022-11-16 11:22:28,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:28,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:28,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:28,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:28,846 INFO L87 Difference]: Start difference. First operand 3142 states and 13985 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:29,272 INFO L93 Difference]: Finished difference Result 3164 states and 14046 transitions. [2022-11-16 11:22:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:29,283 INFO L225 Difference]: With dead ends: 3164 [2022-11-16 11:22:29,283 INFO L226 Difference]: Without dead ends: 3164 [2022-11-16 11:22:29,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:29,283 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:29,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:22:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2022-11-16 11:22:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3142. [2022-11-16 11:22:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3092 states have (on average 4.521668822768435) internal successors, (13981), 3141 states have internal predecessors, (13981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 13981 transitions. [2022-11-16 11:22:29,344 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 13981 transitions. Word has length 10 [2022-11-16 11:22:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:29,344 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 13981 transitions. [2022-11-16 11:22:29,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 13981 transitions. [2022-11-16 11:22:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:29,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:29,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:29,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 11:22:29,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:29,546 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash 465065079, now seen corresponding path program 1 times [2022-11-16 11:22:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:29,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876145668] [2022-11-16 11:22:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:29,547 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 [2022-11-16 11:22:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:29,548 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:29,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:29,961 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:29,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:29,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:30,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:30,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876145668] [2022-11-16 11:22:30,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876145668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:30,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:30,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888740911] [2022-11-16 11:22:30,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:30,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:30,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:30,614 INFO L87 Difference]: Start difference. First operand 3142 states and 13981 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:31,085 INFO L93 Difference]: Finished difference Result 3155 states and 14011 transitions. [2022-11-16 11:22:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:31,096 INFO L225 Difference]: With dead ends: 3155 [2022-11-16 11:22:31,096 INFO L226 Difference]: Without dead ends: 3155 [2022-11-16 11:22:31,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:31,097 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:31,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-16 11:22:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-11-16 11:22:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 3142. [2022-11-16 11:22:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3092 states have (on average 4.521345407503234) internal successors, (13980), 3141 states have internal predecessors, (13980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 13980 transitions. [2022-11-16 11:22:31,174 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 13980 transitions. Word has length 10 [2022-11-16 11:22:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:31,174 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 13980 transitions. [2022-11-16 11:22:31,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 13980 transitions. [2022-11-16 11:22:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:31,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:31,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:31,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:31,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:31,375 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash 524586908, now seen corresponding path program 1 times [2022-11-16 11:22:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:31,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459499690] [2022-11-16 11:22:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:31,376 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 [2022-11-16 11:22:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:31,377 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 11:22:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:31,802 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:31,802 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:31,821 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 84 treesize of output 82 [2022-11-16 11:22:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:32,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:32,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459499690] [2022-11-16 11:22:32,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459499690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:32,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:32,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:32,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136283636] [2022-11-16 11:22:32,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:32,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:32,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:32,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:32,450 INFO L87 Difference]: Start difference. First operand 3142 states and 13980 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:32,875 INFO L93 Difference]: Finished difference Result 3153 states and 14008 transitions. [2022-11-16 11:22:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:32,885 INFO L225 Difference]: With dead ends: 3153 [2022-11-16 11:22:32,885 INFO L226 Difference]: Without dead ends: 3153 [2022-11-16 11:22:32,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:32,886 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:32,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 8 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-11-16 11:22:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2022-11-16 11:22:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3142. [2022-11-16 11:22:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3092 states have (on average 4.521021992238033) internal successors, (13979), 3141 states have internal predecessors, (13979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 13979 transitions. [2022-11-16 11:22:32,947 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 13979 transitions. Word has length 10 [2022-11-16 11:22:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:32,947 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 13979 transitions. [2022-11-16 11:22:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 13979 transitions. [2022-11-16 11:22:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:32,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:32,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:32,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-16 11:22:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:33,149 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1776311913, now seen corresponding path program 1 times [2022-11-16 11:22:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408828137] [2022-11-16 11:22:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:33,150 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 [2022-11-16 11:22:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:33,151 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 11:22:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:22:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:33,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:33,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:22:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:33,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408828137] [2022-11-16 11:22:33,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408828137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:33,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:33,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:22:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862553365] [2022-11-16 11:22:33,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:33,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:22:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:22:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:33,702 INFO L87 Difference]: Start difference. First operand 3142 states and 13979 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:34,978 INFO L93 Difference]: Finished difference Result 8301 states and 37378 transitions. [2022-11-16 11:22:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:22:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:35,012 INFO L225 Difference]: With dead ends: 8301 [2022-11-16 11:22:35,012 INFO L226 Difference]: Without dead ends: 8301 [2022-11-16 11:22:35,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:22:35,013 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 456 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:35,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 3 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:22:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2022-11-16 11:22:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 3844. [2022-11-16 11:22:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3794 states have (on average 4.716921454928835) internal successors, (17896), 3843 states have internal predecessors, (17896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 17896 transitions. [2022-11-16 11:22:35,145 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 17896 transitions. Word has length 10 [2022-11-16 11:22:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:35,145 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 17896 transitions. [2022-11-16 11:22:35,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 17896 transitions. [2022-11-16 11:22:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:35,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:35,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:35,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-16 11:22:35,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:35,347 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650937, now seen corresponding path program 1 times [2022-11-16 11:22:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418001212] [2022-11-16 11:22:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:35,348 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 [2022-11-16 11:22:35,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:35,348 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:35,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:22:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:35,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:35,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:35,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418001212] [2022-11-16 11:22:35,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418001212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:35,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:35,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:22:35,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063585564] [2022-11-16 11:22:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:35,563 INFO L87 Difference]: Start difference. First operand 3844 states and 17896 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-16 11:22:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:35,884 INFO L93 Difference]: Finished difference Result 3844 states and 17271 transitions. [2022-11-16 11:22:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-11-16 11:22:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:35,896 INFO L225 Difference]: With dead ends: 3844 [2022-11-16 11:22:35,896 INFO L226 Difference]: Without dead ends: 3844 [2022-11-16 11:22:35,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:35,897 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 61 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:35,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:22:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2022-11-16 11:22:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3844. [2022-11-16 11:22:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3794 states have (on average 4.55218766473379) internal successors, (17271), 3843 states have internal predecessors, (17271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 17271 transitions. [2022-11-16 11:22:35,996 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 17271 transitions. Word has length 10 [2022-11-16 11:22:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:35,996 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 17271 transitions. [2022-11-16 11:22:35,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-16 11:22:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 17271 transitions. [2022-11-16 11:22:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:35,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:35,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:36,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:36,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:36,197 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650875, now seen corresponding path program 1 times [2022-11-16 11:22:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579249830] [2022-11-16 11:22:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:36,198 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 [2022-11-16 11:22:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:36,199 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:36,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 11:22:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:36,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:36,634 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:36,634 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:36,654 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 88 treesize of output 84 [2022-11-16 11:22:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:36,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:37,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579249830] [2022-11-16 11:22:37,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579249830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:37,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:37,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180937915] [2022-11-16 11:22:37,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:37,302 INFO L87 Difference]: Start difference. First operand 3844 states and 17271 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:37,424 INFO L93 Difference]: Finished difference Result 3851 states and 17289 transitions. [2022-11-16 11:22:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:37,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:37,436 INFO L225 Difference]: With dead ends: 3851 [2022-11-16 11:22:37,436 INFO L226 Difference]: Without dead ends: 3851 [2022-11-16 11:22:37,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:37,437 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:37,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-11-16 11:22:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2022-11-16 11:22:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3844. [2022-11-16 11:22:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3794 states have (on average 4.551924090669478) internal successors, (17270), 3843 states have internal predecessors, (17270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 17270 transitions. [2022-11-16 11:22:37,516 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 17270 transitions. Word has length 10 [2022-11-16 11:22:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:37,516 INFO L495 AbstractCegarLoop]: Abstraction has 3844 states and 17270 transitions. [2022-11-16 11:22:37,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 17270 transitions. [2022-11-16 11:22:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:37,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:37,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:37,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:37,724 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1782650997, now seen corresponding path program 1 times [2022-11-16 11:22:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479161318] [2022-11-16 11:22:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:37,725 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 [2022-11-16 11:22:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:37,726 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:37,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 11:22:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:38,128 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:22:38,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:22:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:38,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:38,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479161318] [2022-11-16 11:22:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479161318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:38,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:22:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10036342] [2022-11-16 11:22:38,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:22:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:22:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:38,833 INFO L87 Difference]: Start difference. First operand 3844 states and 17270 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:40,722 INFO L93 Difference]: Finished difference Result 6380 states and 29986 transitions. [2022-11-16 11:22:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:22:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-16 11:22:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:40,757 INFO L225 Difference]: With dead ends: 6380 [2022-11-16 11:22:40,757 INFO L226 Difference]: Without dead ends: 6380 [2022-11-16 11:22:40,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:22:40,758 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 344 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:40,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 10 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:22:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6380 states. [2022-11-16 11:22:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6380 to 5719. [2022-11-16 11:22:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5719 states, 5669 states have (on average 4.882166166872464) internal successors, (27677), 5718 states have internal predecessors, (27677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5719 states to 5719 states and 27677 transitions. [2022-11-16 11:22:40,890 INFO L78 Accepts]: Start accepts. Automaton has 5719 states and 27677 transitions. Word has length 10 [2022-11-16 11:22:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:40,890 INFO L495 AbstractCegarLoop]: Abstraction has 5719 states and 27677 transitions. [2022-11-16 11:22:40,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5719 states and 27677 transitions. [2022-11-16 11:22:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:40,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:40,891 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:40,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 11:22:41,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:41,091 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1480908956, now seen corresponding path program 2 times [2022-11-16 11:22:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:41,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578243806] [2022-11-16 11:22:41,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:41,092 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 [2022-11-16 11:22:41,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:41,093 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:41,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:41,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:41,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:22:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:41,553 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:41,553 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:41,586 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 60 treesize of output 58 [2022-11-16 11:22:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:41,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:41,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:41,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578243806] [2022-11-16 11:22:41,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578243806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:41,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:41,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895353113] [2022-11-16 11:22:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:41,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:41,883 INFO L87 Difference]: Start difference. First operand 5719 states and 27677 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) [2022-11-16 11:22:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:42,033 INFO L93 Difference]: Finished difference Result 5718 states and 27674 transitions. [2022-11-16 11:22:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:42,033 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 10 [2022-11-16 11:22:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:42,053 INFO L225 Difference]: With dead ends: 5718 [2022-11-16 11:22:42,053 INFO L226 Difference]: Without dead ends: 5718 [2022-11-16 11:22:42,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:42,054 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:42,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 11:22:42,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2022-11-16 11:22:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 5718. [2022-11-16 11:22:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5668 states have (on average 4.882498235709245) internal successors, (27674), 5717 states have internal predecessors, (27674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 27674 transitions. [2022-11-16 11:22:42,180 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 27674 transitions. Word has length 10 [2022-11-16 11:22:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:42,180 INFO L495 AbstractCegarLoop]: Abstraction has 5718 states and 27674 transitions. [2022-11-16 11:22:42,180 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) [2022-11-16 11:22:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 27674 transitions. [2022-11-16 11:22:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:22:42,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:42,181 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:42,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:42,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:42,381 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:42,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1474371428, now seen corresponding path program 2 times [2022-11-16 11:22:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:42,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502047331] [2022-11-16 11:22:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:42,382 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 [2022-11-16 11:22:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:42,383 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:42,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:42,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:42,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:42,757 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:42,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:42,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:43,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:43,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502047331] [2022-11-16 11:22:43,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502047331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:43,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:43,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:43,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710422964] [2022-11-16 11:22:43,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:43,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:43,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:43,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:43,034 INFO L87 Difference]: Start difference. First operand 5718 states and 27674 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) [2022-11-16 11:22:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:43,200 INFO L93 Difference]: Finished difference Result 5717 states and 27671 transitions. [2022-11-16 11:22:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:43,201 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 10 [2022-11-16 11:22:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:43,221 INFO L225 Difference]: With dead ends: 5717 [2022-11-16 11:22:43,221 INFO L226 Difference]: Without dead ends: 5717 [2022-11-16 11:22:43,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:43,222 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:43,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-11-16 11:22:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2022-11-16 11:22:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 5717. [2022-11-16 11:22:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5667 states have (on average 4.8828304217398975) internal successors, (27671), 5716 states have internal predecessors, (27671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 27671 transitions. [2022-11-16 11:22:43,343 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 27671 transitions. Word has length 10 [2022-11-16 11:22:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:43,343 INFO L495 AbstractCegarLoop]: Abstraction has 5717 states and 27671 transitions. [2022-11-16 11:22:43,343 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) [2022-11-16 11:22:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 27671 transitions. [2022-11-16 11:22:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:22:43,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:43,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:43,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:43,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:43,544 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1537028189, now seen corresponding path program 1 times [2022-11-16 11:22:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531758936] [2022-11-16 11:22:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:43,545 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 [2022-11-16 11:22:43,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:43,546 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:43,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 11:22:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:22:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:43,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:43,950 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:43,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:43,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:44,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:22:44,849 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531758936] [2022-11-16 11:22:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531758936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:44,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:44,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:22:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554640925] [2022-11-16 11:22:44,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:22:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:22:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:44,851 INFO L87 Difference]: Start difference. First operand 5717 states and 27671 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:46,178 INFO L93 Difference]: Finished difference Result 13765 states and 68886 transitions. [2022-11-16 11:22:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:22:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:22:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:46,244 INFO L225 Difference]: With dead ends: 13765 [2022-11-16 11:22:46,244 INFO L226 Difference]: Without dead ends: 13765 [2022-11-16 11:22:46,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:22:46,246 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 219 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 471 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:46,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 17 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 471 Unchecked, 1.2s Time] [2022-11-16 11:22:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13765 states. [2022-11-16 11:22:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13765 to 5817. [2022-11-16 11:22:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5767 states have (on average 4.866481706259754) internal successors, (28065), 5816 states have internal predecessors, (28065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 28065 transitions. [2022-11-16 11:22:46,459 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 28065 transitions. Word has length 11 [2022-11-16 11:22:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:46,459 INFO L495 AbstractCegarLoop]: Abstraction has 5817 states and 28065 transitions. [2022-11-16 11:22:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 28065 transitions. [2022-11-16 11:22:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:22:46,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:46,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:46,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 11:22:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:46,663 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1525755659, now seen corresponding path program 2 times [2022-11-16 11:22:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:46,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052312974] [2022-11-16 11:22:46,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:46,664 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 [2022-11-16 11:22:46,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:46,665 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:46,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 11:22:46,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:46,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:22:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:47,074 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:22:47,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:22:47,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:22:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:22:47,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:47,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052312974] [2022-11-16 11:22:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052312974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:47,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:47,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:47,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602271145] [2022-11-16 11:22:47,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:47,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:47,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:47,322 INFO L87 Difference]: Start difference. First operand 5817 states and 28065 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:22:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:47,455 INFO L93 Difference]: Finished difference Result 5811 states and 28040 transitions. [2022-11-16 11:22:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 [2022-11-16 11:22:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:47,477 INFO L225 Difference]: With dead ends: 5811 [2022-11-16 11:22:47,477 INFO L226 Difference]: Without dead ends: 5811 [2022-11-16 11:22:47,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:47,477 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:47,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 11:22:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2022-11-16 11:22:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 5811. [2022-11-16 11:22:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 5761 states have (on average 4.867210553723312) internal successors, (28040), 5810 states have internal predecessors, (28040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 28040 transitions. [2022-11-16 11:22:47,604 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 28040 transitions. Word has length 11 [2022-11-16 11:22:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:47,604 INFO L495 AbstractCegarLoop]: Abstraction has 5811 states and 28040 transitions. [2022-11-16 11:22:47,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:22:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 28040 transitions. [2022-11-16 11:22:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:22:47,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:47,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:47,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 11:22:47,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:47,805 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1526156241, now seen corresponding path program 1 times [2022-11-16 11:22:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:47,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825139437] [2022-11-16 11:22:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:47,806 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 [2022-11-16 11:22:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:47,807 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:47,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:22:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:22:48,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:48,263 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:22:48,263 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:22:48,283 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 130 treesize of output 126 [2022-11-16 11:22:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:48,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:49,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825139437] [2022-11-16 11:22:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825139437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:49,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:49,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:22:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523430459] [2022-11-16 11:22:49,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:22:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:22:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:22:49,027 INFO L87 Difference]: Start difference. First operand 5811 states and 28040 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:49,678 INFO L93 Difference]: Finished difference Result 5852 states and 28166 transitions. [2022-11-16 11:22:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:22:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:22:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:49,700 INFO L225 Difference]: With dead ends: 5852 [2022-11-16 11:22:49,701 INFO L226 Difference]: Without dead ends: 5852 [2022-11-16 11:22:49,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:22:49,701 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:49,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 8 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-16 11:22:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2022-11-16 11:22:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5811. [2022-11-16 11:22:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 5761 states have (on average 4.866169067870161) internal successors, (28034), 5810 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 28034 transitions. [2022-11-16 11:22:49,830 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 28034 transitions. Word has length 11 [2022-11-16 11:22:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:49,830 INFO L495 AbstractCegarLoop]: Abstraction has 5811 states and 28034 transitions. [2022-11-16 11:22:49,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 28034 transitions. [2022-11-16 11:22:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:22:49,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:49,831 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:49,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:50,035 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:50,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1525957367, now seen corresponding path program 2 times [2022-11-16 11:22:50,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:50,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781985096] [2022-11-16 11:22:50,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:50,035 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 [2022-11-16 11:22:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:50,036 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:50,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 11:22:50,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:50,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:50,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:22:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:50,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:50,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:50,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:50,416 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:22:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:22:50,452 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:22:50,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 11:22:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:22:50,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:50,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:50,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781985096] [2022-11-16 11:22:50,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781985096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:50,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:50,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036723817] [2022-11-16 11:22:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:50,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:50,676 INFO L87 Difference]: Start difference. First operand 5811 states and 28034 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) [2022-11-16 11:22:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:50,819 INFO L93 Difference]: Finished difference Result 5807 states and 28022 transitions. [2022-11-16 11:22:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:50,820 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 11 [2022-11-16 11:22:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:50,841 INFO L225 Difference]: With dead ends: 5807 [2022-11-16 11:22:50,841 INFO L226 Difference]: Without dead ends: 5807 [2022-11-16 11:22:50,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:50,842 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:50,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-16 11:22:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5807 states. [2022-11-16 11:22:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5807 to 5805. [2022-11-16 11:22:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5805 states, 5756 states have (on average 4.8679638637943015) internal successors, (28020), 5804 states have internal predecessors, (28020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5805 states to 5805 states and 28020 transitions. [2022-11-16 11:22:50,969 INFO L78 Accepts]: Start accepts. Automaton has 5805 states and 28020 transitions. Word has length 11 [2022-11-16 11:22:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:50,969 INFO L495 AbstractCegarLoop]: Abstraction has 5805 states and 28020 transitions. [2022-11-16 11:22:50,969 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) [2022-11-16 11:22:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5805 states and 28020 transitions. [2022-11-16 11:22:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:22:50,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:50,970 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:50,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-16 11:22:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:51,171 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:22:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1525957484, now seen corresponding path program 2 times [2022-11-16 11:22:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530488052] [2022-11-16 11:22:51,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:51,172 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 [2022-11-16 11:22:51,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:51,173 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:22:51,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 11:22:51,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:22:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:22:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:51,605 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:22:51,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:22:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:51,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:22:53,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:53,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530488052] [2022-11-16 11:22:53,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530488052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:53,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:53,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:22:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135649333] [2022-11-16 11:22:53,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:22:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:22:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:22:53,276 INFO L87 Difference]: Start difference. First operand 5805 states and 28020 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:10,239 INFO L93 Difference]: Finished difference Result 17338 states and 79706 transitions. [2022-11-16 11:23:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:23:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:10,336 INFO L225 Difference]: With dead ends: 17338 [2022-11-16 11:23:10,336 INFO L226 Difference]: Without dead ends: 17338 [2022-11-16 11:23:10,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:23:10,337 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 782 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:10,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 67 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-16 11:23:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17338 states. [2022-11-16 11:23:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17338 to 9926. [2022-11-16 11:23:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9877 states have (on average 4.826566771286828) internal successors, (47672), 9925 states have internal predecessors, (47672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 47672 transitions. [2022-11-16 11:23:10,668 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 47672 transitions. Word has length 11 [2022-11-16 11:23:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:10,668 INFO L495 AbstractCegarLoop]: Abstraction has 9926 states and 47672 transitions. [2022-11-16 11:23:10,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 47672 transitions. [2022-11-16 11:23:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:10,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:10,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:10,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:23:10,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:10,870 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:10,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:10,870 INFO L85 PathProgramCache]: Analyzing trace with hash -823459344, now seen corresponding path program 1 times [2022-11-16 11:23:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:10,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690573813] [2022-11-16 11:23:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:10,871 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 [2022-11-16 11:23:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:10,871 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:10,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:23:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:11,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:23:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:11,341 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:11,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:12,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690573813] [2022-11-16 11:23:12,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690573813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:12,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:12,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:23:12,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927248883] [2022-11-16 11:23:12,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:12,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:12,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:12,095 INFO L87 Difference]: Start difference. First operand 9926 states and 47672 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:12,644 INFO L93 Difference]: Finished difference Result 9925 states and 47668 transitions. [2022-11-16 11:23:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:12,684 INFO L225 Difference]: With dead ends: 9925 [2022-11-16 11:23:12,684 INFO L226 Difference]: Without dead ends: 9925 [2022-11-16 11:23:12,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:12,684 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:12,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 42 Unchecked, 0.5s Time] [2022-11-16 11:23:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9925 states. [2022-11-16 11:23:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9925 to 9925. [2022-11-16 11:23:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9876 states have (on average 4.826650465775618) internal successors, (47668), 9924 states have internal predecessors, (47668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 47668 transitions. [2022-11-16 11:23:12,919 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 47668 transitions. Word has length 11 [2022-11-16 11:23:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:12,919 INFO L495 AbstractCegarLoop]: Abstraction has 9925 states and 47668 transitions. [2022-11-16 11:23:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 47668 transitions. [2022-11-16 11:23:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:12,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:12,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:12,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:23:13,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:13,121 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:13,121 INFO L85 PathProgramCache]: Analyzing trace with hash -917675040, now seen corresponding path program 1 times [2022-11-16 11:23:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941023701] [2022-11-16 11:23:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:13,122 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 [2022-11-16 11:23:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:13,123 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:13,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 11:23:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:23:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:13,611 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:23:13,612 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:23:13,633 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 60 treesize of output 58 [2022-11-16 11:23:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:13,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:14,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:14,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941023701] [2022-11-16 11:23:14,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941023701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:14,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:14,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:23:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481358107] [2022-11-16 11:23:14,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:14,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:14,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:14,267 INFO L87 Difference]: Start difference. First operand 9925 states and 47668 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:14,707 INFO L93 Difference]: Finished difference Result 9921 states and 47647 transitions. [2022-11-16 11:23:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:14,749 INFO L225 Difference]: With dead ends: 9921 [2022-11-16 11:23:14,749 INFO L226 Difference]: Without dead ends: 9921 [2022-11-16 11:23:14,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:14,750 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:14,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-11-16 11:23:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2022-11-16 11:23:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 9921. [2022-11-16 11:23:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9921 states, 9872 states have (on average 4.826478930307942) internal successors, (47647), 9920 states have internal predecessors, (47647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9921 states to 9921 states and 47647 transitions. [2022-11-16 11:23:14,981 INFO L78 Accepts]: Start accepts. Automaton has 9921 states and 47647 transitions. Word has length 11 [2022-11-16 11:23:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:14,982 INFO L495 AbstractCegarLoop]: Abstraction has 9921 states and 47647 transitions. [2022-11-16 11:23:14,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9921 states and 47647 transitions. [2022-11-16 11:23:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:14,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:14,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:14,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:23:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:15,183 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:15,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash 769100022, now seen corresponding path program 1 times [2022-11-16 11:23:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:15,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021498845] [2022-11-16 11:23:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:15,184 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 [2022-11-16 11:23:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:15,185 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:15,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 11:23:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:23:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:15,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:15,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:15,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021498845] [2022-11-16 11:23:15,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021498845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:15,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:15,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:23:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62101642] [2022-11-16 11:23:15,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:23:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:15,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:23:15,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:23:15,393 INFO L87 Difference]: Start difference. First operand 9921 states and 47647 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) [2022-11-16 11:23:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:15,605 INFO L93 Difference]: Finished difference Result 8391 states and 39586 transitions. [2022-11-16 11:23:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:23:15,611 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 [2022-11-16 11:23:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:15,643 INFO L225 Difference]: With dead ends: 8391 [2022-11-16 11:23:15,643 INFO L226 Difference]: Without dead ends: 8391 [2022-11-16 11:23:15,643 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 [2022-11-16 11:23:15,643 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:15,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:23:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8391 states. [2022-11-16 11:23:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8391 to 8391. [2022-11-16 11:23:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8350 states have (on average 4.740838323353294) internal successors, (39586), 8390 states have internal predecessors, (39586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 39586 transitions. [2022-11-16 11:23:15,833 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 39586 transitions. Word has length 11 [2022-11-16 11:23:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:15,834 INFO L495 AbstractCegarLoop]: Abstraction has 8391 states and 39586 transitions. [2022-11-16 11:23:15,834 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) [2022-11-16 11:23:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 39586 transitions. [2022-11-16 11:23:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:15,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:15,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:15,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-16 11:23:16,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:16,036 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 769100023, now seen corresponding path program 1 times [2022-11-16 11:23:16,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:16,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821985448] [2022-11-16 11:23:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:16,037 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 [2022-11-16 11:23:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:16,038 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:16,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:23:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:16,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:23:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:16,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:16,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:16,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821985448] [2022-11-16 11:23:16,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821985448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:16,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:16,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:23:16,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178805942] [2022-11-16 11:23:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:16,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:16,292 INFO L87 Difference]: Start difference. First operand 8391 states and 39586 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:23:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:16,508 INFO L93 Difference]: Finished difference Result 6861 states and 31525 transitions. [2022-11-16 11:23:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:23:16,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 [2022-11-16 11:23:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:16,530 INFO L225 Difference]: With dead ends: 6861 [2022-11-16 11:23:16,530 INFO L226 Difference]: Without dead ends: 6861 [2022-11-16 11:23:16,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:16,530 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:16,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:23:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6861 states. [2022-11-16 11:23:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6861 to 6861. [2022-11-16 11:23:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6828 states have (on average 4.617018160515524) internal successors, (31525), 6860 states have internal predecessors, (31525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31525 transitions. [2022-11-16 11:23:16,677 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31525 transitions. Word has length 11 [2022-11-16 11:23:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:16,677 INFO L495 AbstractCegarLoop]: Abstraction has 6861 states and 31525 transitions. [2022-11-16 11:23:16,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:23:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31525 transitions. [2022-11-16 11:23:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:16,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:16,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:16,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:23:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:16,889 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash 768909653, now seen corresponding path program 1 times [2022-11-16 11:23:16,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53287776] [2022-11-16 11:23:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:16,890 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 [2022-11-16 11:23:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:16,891 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:16,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:23:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:23:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:17,385 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:23:17,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:23:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:18,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:18,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53287776] [2022-11-16 11:23:18,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53287776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:18,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:18,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:23:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689043913] [2022-11-16 11:23:18,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:18,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:23:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:23:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:23:18,077 INFO L87 Difference]: Start difference. First operand 6861 states and 31525 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:20,083 INFO L93 Difference]: Finished difference Result 11679 states and 54552 transitions. [2022-11-16 11:23:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:23:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:20,127 INFO L225 Difference]: With dead ends: 11679 [2022-11-16 11:23:20,127 INFO L226 Difference]: Without dead ends: 11679 [2022-11-16 11:23:20,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:23:20,128 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 272 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:20,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:23:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11679 states. [2022-11-16 11:23:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11679 to 10470. [2022-11-16 11:23:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10470 states, 10437 states have (on average 4.818721854939159) internal successors, (50293), 10469 states have internal predecessors, (50293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10470 states to 10470 states and 50293 transitions. [2022-11-16 11:23:20,359 INFO L78 Accepts]: Start accepts. Automaton has 10470 states and 50293 transitions. Word has length 11 [2022-11-16 11:23:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:20,360 INFO L495 AbstractCegarLoop]: Abstraction has 10470 states and 50293 transitions. [2022-11-16 11:23:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10470 states and 50293 transitions. [2022-11-16 11:23:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:20,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:20,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:20,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:20,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:20,573 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash 572397657, now seen corresponding path program 1 times [2022-11-16 11:23:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003442551] [2022-11-16 11:23:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:20,574 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 [2022-11-16 11:23:20,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:20,575 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:20,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 11:23:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:23:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:20,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:21,048 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:23:21,048 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:23:21,067 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 152 treesize of output 144 [2022-11-16 11:23:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:21,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003442551] [2022-11-16 11:23:21,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003442551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:21,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:21,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:23:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741922500] [2022-11-16 11:23:21,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:23:21,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:23:21,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:23:21,975 INFO L87 Difference]: Start difference. First operand 10470 states and 50293 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:22,732 INFO L93 Difference]: Finished difference Result 11604 states and 54269 transitions. [2022-11-16 11:23:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:23:22,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:22,776 INFO L225 Difference]: With dead ends: 11604 [2022-11-16 11:23:22,776 INFO L226 Difference]: Without dead ends: 11604 [2022-11-16 11:23:22,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:23:22,777 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:22,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 11 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-16 11:23:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11604 states. [2022-11-16 11:23:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11604 to 10470. [2022-11-16 11:23:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10470 states, 10437 states have (on average 4.8181469771006995) internal successors, (50287), 10469 states have internal predecessors, (50287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10470 states to 10470 states and 50287 transitions. [2022-11-16 11:23:23,023 INFO L78 Accepts]: Start accepts. Automaton has 10470 states and 50287 transitions. Word has length 11 [2022-11-16 11:23:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:23,023 INFO L495 AbstractCegarLoop]: Abstraction has 10470 states and 50287 transitions. [2022-11-16 11:23:23,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 10470 states and 50287 transitions. [2022-11-16 11:23:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:23,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:23,024 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:23,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-16 11:23:23,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:23,224 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1336456695, now seen corresponding path program 2 times [2022-11-16 11:23:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:23,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795735393] [2022-11-16 11:23:23,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:23,225 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 [2022-11-16 11:23:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:23,226 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:23,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 11:23:23,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:23,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:23:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:23,622 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:23,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:23,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:23,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795735393] [2022-11-16 11:23:23,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795735393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:23,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:23,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:23:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082771738] [2022-11-16 11:23:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:23,886 INFO L87 Difference]: Start difference. First operand 10470 states and 50287 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) [2022-11-16 11:23:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:24,063 INFO L93 Difference]: Finished difference Result 10468 states and 50281 transitions. [2022-11-16 11:23:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:24,063 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 11 [2022-11-16 11:23:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:24,101 INFO L225 Difference]: With dead ends: 10468 [2022-11-16 11:23:24,101 INFO L226 Difference]: Without dead ends: 10468 [2022-11-16 11:23:24,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:24,101 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:24,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 11:23:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2022-11-16 11:23:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 10468. [2022-11-16 11:23:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10435 states have (on average 4.818495448011499) internal successors, (50281), 10467 states have internal predecessors, (50281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 50281 transitions. [2022-11-16 11:23:24,473 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 50281 transitions. Word has length 11 [2022-11-16 11:23:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:24,473 INFO L495 AbstractCegarLoop]: Abstraction has 10468 states and 50281 transitions. [2022-11-16 11:23:24,473 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) [2022-11-16 11:23:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 50281 transitions. [2022-11-16 11:23:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:23:24,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:24,474 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:24,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:24,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:24,674 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1539328944, now seen corresponding path program 2 times [2022-11-16 11:23:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:24,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685903291] [2022-11-16 11:23:24,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:24,676 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 [2022-11-16 11:23:24,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:24,676 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:24,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 11:23:24,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:24,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:23:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:24,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:25,101 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 11:23:25,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 11:23:25,123 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 1195 treesize of output 1179 [2022-11-16 11:23:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:25,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:25,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:25,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685903291] [2022-11-16 11:23:25,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685903291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:25,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:25,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:23:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761751877] [2022-11-16 11:23:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:23:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:23:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:23:25,234 INFO L87 Difference]: Start difference. First operand 10468 states and 50281 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:25,445 INFO L93 Difference]: Finished difference Result 9532 states and 45586 transitions. [2022-11-16 11:23:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:23:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:23:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:25,477 INFO L225 Difference]: With dead ends: 9532 [2022-11-16 11:23:25,477 INFO L226 Difference]: Without dead ends: 9532 [2022-11-16 11:23:25,477 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 [2022-11-16 11:23:25,478 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:25,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:23:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9532 states. [2022-11-16 11:23:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9532 to 8616. [2022-11-16 11:23:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8591 states have (on average 4.785938773134676) internal successors, (41116), 8615 states have internal predecessors, (41116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 41116 transitions. [2022-11-16 11:23:25,684 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 41116 transitions. Word has length 11 [2022-11-16 11:23:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:25,684 INFO L495 AbstractCegarLoop]: Abstraction has 8616 states and 41116 transitions. [2022-11-16 11:23:25,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 41116 transitions. [2022-11-16 11:23:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:25,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:25,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:25,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-16 11:23:25,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:25,886 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 53779248, now seen corresponding path program 1 times [2022-11-16 11:23:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:25,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337383175] [2022-11-16 11:23:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:25,887 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 [2022-11-16 11:23:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:25,888 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 11:23:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:26,318 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:26,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:26,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:26,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337383175] [2022-11-16 11:23:26,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337383175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:26,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:26,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:23:26,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837464291] [2022-11-16 11:23:26,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:26,972 INFO L87 Difference]: Start difference. First operand 8616 states and 41116 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:27,423 INFO L93 Difference]: Finished difference Result 8636 states and 41146 transitions. [2022-11-16 11:23:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 11:23:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:27,452 INFO L225 Difference]: With dead ends: 8636 [2022-11-16 11:23:27,452 INFO L226 Difference]: Without dead ends: 8636 [2022-11-16 11:23:27,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:27,452 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:27,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-16 11:23:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2022-11-16 11:23:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 8624. [2022-11-16 11:23:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8599 states have (on average 4.7831143156180955) internal successors, (41130), 8623 states have internal predecessors, (41130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 41130 transitions. [2022-11-16 11:23:27,629 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 41130 transitions. Word has length 12 [2022-11-16 11:23:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:27,630 INFO L495 AbstractCegarLoop]: Abstraction has 8624 states and 41130 transitions. [2022-11-16 11:23:27,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 41130 transitions. [2022-11-16 11:23:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:27,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:27,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:27,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 11:23:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:27,831 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash 66201506, now seen corresponding path program 1 times [2022-11-16 11:23:27,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:27,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073859233] [2022-11-16 11:23:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:27,832 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 [2022-11-16 11:23:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:27,833 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:27,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 11:23:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:23:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:28,311 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:23:28,311 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:23:28,335 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 599 treesize of output 583 [2022-11-16 11:23:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:28,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:28,991 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:28,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073859233] [2022-11-16 11:23:28,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073859233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:28,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:28,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:23:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031934981] [2022-11-16 11:23:28,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:28,992 INFO L87 Difference]: Start difference. First operand 8624 states and 41130 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:29,463 INFO L93 Difference]: Finished difference Result 8635 states and 41165 transitions. [2022-11-16 11:23:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 11:23:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:29,491 INFO L225 Difference]: With dead ends: 8635 [2022-11-16 11:23:29,491 INFO L226 Difference]: Without dead ends: 8635 [2022-11-16 11:23:29,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:29,491 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:29,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-16 11:23:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8635 states. [2022-11-16 11:23:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8635 to 8633. [2022-11-16 11:23:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8608 states have (on average 4.78217936802974) internal successors, (41165), 8632 states have internal predecessors, (41165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 41165 transitions. [2022-11-16 11:23:29,659 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 41165 transitions. Word has length 12 [2022-11-16 11:23:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:29,659 INFO L495 AbstractCegarLoop]: Abstraction has 8633 states and 41165 transitions. [2022-11-16 11:23:29,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 41165 transitions. [2022-11-16 11:23:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:29,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:29,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:29,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:29,873 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash 242564108, now seen corresponding path program 1 times [2022-11-16 11:23:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314626028] [2022-11-16 11:23:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:29,873 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 [2022-11-16 11:23:29,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:29,874 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:29,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 11:23:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:23:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:30,414 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:23:30,414 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:23:30,432 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 60 treesize of output 58 [2022-11-16 11:23:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:30,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:31,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314626028] [2022-11-16 11:23:31,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314626028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:31,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:31,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:23:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786131711] [2022-11-16 11:23:31,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:23:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:23:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:31,097 INFO L87 Difference]: Start difference. First operand 8633 states and 41165 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:31,559 INFO L93 Difference]: Finished difference Result 8637 states and 41182 transitions. [2022-11-16 11:23:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:23:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 11:23:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:31,587 INFO L225 Difference]: With dead ends: 8637 [2022-11-16 11:23:31,587 INFO L226 Difference]: Without dead ends: 8637 [2022-11-16 11:23:31,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:23:31,588 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:31,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:23:31,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2022-11-16 11:23:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 8633. [2022-11-16 11:23:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8608 states have (on average 4.78217936802974) internal successors, (41165), 8632 states have internal predecessors, (41165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 41165 transitions. [2022-11-16 11:23:31,767 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 41165 transitions. Word has length 12 [2022-11-16 11:23:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:31,767 INFO L495 AbstractCegarLoop]: Abstraction has 8633 states and 41165 transitions. [2022-11-16 11:23:31,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 11:23:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 41165 transitions. [2022-11-16 11:23:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:31,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:31,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:31,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-16 11:23:31,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:31,969 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:31,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1616844766, now seen corresponding path program 1 times [2022-11-16 11:23:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:31,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662486784] [2022-11-16 11:23:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:31,970 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 [2022-11-16 11:23:31,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:31,971 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:31,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 11:23:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:32,403 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:32,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:32,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:32,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:23:33,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662486784] [2022-11-16 11:23:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662486784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:33,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:23:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130113988] [2022-11-16 11:23:33,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:23:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:23:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:23:33,290 INFO L87 Difference]: Start difference. First operand 8633 states and 41165 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:23:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:33,927 INFO L93 Difference]: Finished difference Result 9593 states and 44493 transitions. [2022-11-16 11:23:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:23:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-16 11:23:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:33,959 INFO L225 Difference]: With dead ends: 9593 [2022-11-16 11:23:33,959 INFO L226 Difference]: Without dead ends: 9593 [2022-11-16 11:23:33,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:23:33,960 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:33,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 11 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-11-16 11:23:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9593 states. [2022-11-16 11:23:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9593 to 8646. [2022-11-16 11:23:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8646 states, 8621 states have (on average 4.780303909059274) internal successors, (41211), 8645 states have internal predecessors, (41211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 41211 transitions. [2022-11-16 11:23:34,140 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 41211 transitions. Word has length 12 [2022-11-16 11:23:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:34,140 INFO L495 AbstractCegarLoop]: Abstraction has 8646 states and 41211 transitions. [2022-11-16 11:23:34,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-16 11:23:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 41211 transitions. [2022-11-16 11:23:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:34,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:34,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:34,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 11:23:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:34,347 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash 564451700, now seen corresponding path program 2 times [2022-11-16 11:23:34,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:34,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893844176] [2022-11-16 11:23:34,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:34,347 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 [2022-11-16 11:23:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:34,349 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:34,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 11:23:34,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:34,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:34,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:34,752 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:34,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:34,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:23:35,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:35,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:35,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893844176] [2022-11-16 11:23:35,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893844176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:35,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:35,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:23:35,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000615643] [2022-11-16 11:23:35,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:35,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:35,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:35,019 INFO L87 Difference]: Start difference. First operand 8646 states and 41211 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:23:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:35,165 INFO L93 Difference]: Finished difference Result 8626 states and 41137 transitions. [2022-11-16 11:23:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 12 [2022-11-16 11:23:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:35,194 INFO L225 Difference]: With dead ends: 8626 [2022-11-16 11:23:35,194 INFO L226 Difference]: Without dead ends: 8626 [2022-11-16 11:23:35,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:35,194 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:35,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:23:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2022-11-16 11:23:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 8608. [2022-11-16 11:23:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8608 states, 8583 states have (on average 4.786321798904812) internal successors, (41081), 8607 states have internal predecessors, (41081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8608 states to 8608 states and 41081 transitions. [2022-11-16 11:23:35,366 INFO L78 Accepts]: Start accepts. Automaton has 8608 states and 41081 transitions. Word has length 12 [2022-11-16 11:23:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 8608 states and 41081 transitions. [2022-11-16 11:23:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:23:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 8608 states and 41081 transitions. [2022-11-16 11:23:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:35,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:35,368 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:35,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-16 11:23:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:35,568 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1516477853, now seen corresponding path program 2 times [2022-11-16 11:23:35,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:35,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555569066] [2022-11-16 11:23:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:35,569 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 [2022-11-16 11:23:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:35,570 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:35,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 11:23:35,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:35,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:35,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:35,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:35,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:35,985 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:23:35,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:23:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:23:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:36,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:36,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555569066] [2022-11-16 11:23:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555569066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:36,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:23:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29167838] [2022-11-16 11:23:36,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:23:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:23:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:36,271 INFO L87 Difference]: Start difference. First operand 8608 states and 41081 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-16 11:23:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:36,433 INFO L93 Difference]: Finished difference Result 8606 states and 41075 transitions. [2022-11-16 11:23:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:23:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:23:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:36,545 INFO L225 Difference]: With dead ends: 8606 [2022-11-16 11:23:36,545 INFO L226 Difference]: Without dead ends: 8606 [2022-11-16 11:23:36,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:23:36,546 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:36,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-16 11:23:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8606 states. [2022-11-16 11:23:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8606 to 8606. [2022-11-16 11:23:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8606 states, 8581 states have (on average 4.7867381424076445) internal successors, (41075), 8605 states have internal predecessors, (41075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8606 states to 8606 states and 41075 transitions. [2022-11-16 11:23:36,726 INFO L78 Accepts]: Start accepts. Automaton has 8606 states and 41075 transitions. Word has length 12 [2022-11-16 11:23:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:36,727 INFO L495 AbstractCegarLoop]: Abstraction has 8606 states and 41075 transitions. [2022-11-16 11:23:36,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-16 11:23:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8606 states and 41075 transitions. [2022-11-16 11:23:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:23:36,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:36,728 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:23:36,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-16 11:23:36,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:36,934 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:23:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash 38615312, now seen corresponding path program 3 times [2022-11-16 11:23:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:36,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367700927] [2022-11-16 11:23:36,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:23:36,935 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 [2022-11-16 11:23:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:36,937 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:23:36,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 11:23:37,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:23:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:37,478 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:23:37,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:23:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:38,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:23:41,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:41,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367700927] [2022-11-16 11:23:41,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367700927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:41,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:41,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:23:41,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869030470] [2022-11-16 11:23:41,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:41,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:23:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:23:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:23:41,009 INFO L87 Difference]: Start difference. First operand 8606 states and 41075 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) [2022-11-16 11:24:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:11,614 INFO L93 Difference]: Finished difference Result 100044 states and 482344 transitions. [2022-11-16 11:24:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:24:11,615 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 [2022-11-16 11:24:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:12,548 INFO L225 Difference]: With dead ends: 100044 [2022-11-16 11:24:12,548 INFO L226 Difference]: Without dead ends: 100044 [2022-11-16 11:24:12,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:24:12,548 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3414 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4569 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:12,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 120 Invalid, 4591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4569 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-11-16 11:24:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100044 states. [2022-11-16 11:24:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100044 to 8618. [2022-11-16 11:24:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8593 states have (on average 4.782846502967532) internal successors, (41099), 8617 states have internal predecessors, (41099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 41099 transitions. [2022-11-16 11:24:14,229 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 41099 transitions. Word has length 12 [2022-11-16 11:24:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:14,230 INFO L495 AbstractCegarLoop]: Abstraction has 8618 states and 41099 transitions. [2022-11-16 11:24:14,230 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) [2022-11-16 11:24:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 41099 transitions. [2022-11-16 11:24:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:14,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:14,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:14,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:14,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:14,435 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:14,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1667154979, now seen corresponding path program 1 times [2022-11-16 11:24:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:14,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122695870] [2022-11-16 11:24:14,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:14,436 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 [2022-11-16 11:24:14,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:14,436 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:14,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 11:24:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:24:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:14,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:14,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:14,894 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:24:14,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:24:14,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:24:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:24:15,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:24:15,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:15,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122695870] [2022-11-16 11:24:15,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122695870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:15,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:15,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:24:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993756692] [2022-11-16 11:24:15,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:24:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:24:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:24:15,957 INFO L87 Difference]: Start difference. First operand 8618 states and 41099 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:17,171 INFO L93 Difference]: Finished difference Result 17756 states and 86970 transitions. [2022-11-16 11:24:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:24:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-16 11:24:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:17,376 INFO L225 Difference]: With dead ends: 17756 [2022-11-16 11:24:17,376 INFO L226 Difference]: Without dead ends: 17756 [2022-11-16 11:24:17,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:24:17,377 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 327 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:17,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 14 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 327 Unchecked, 1.0s Time] [2022-11-16 11:24:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17756 states. [2022-11-16 11:24:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17756 to 12820. [2022-11-16 11:24:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12820 states, 12795 states have (on average 5.115904650254006) internal successors, (65458), 12819 states have internal predecessors, (65458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12820 states to 12820 states and 65458 transitions. [2022-11-16 11:24:17,822 INFO L78 Accepts]: Start accepts. Automaton has 12820 states and 65458 transitions. Word has length 13 [2022-11-16 11:24:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:17,823 INFO L495 AbstractCegarLoop]: Abstraction has 12820 states and 65458 transitions. [2022-11-16 11:24:17,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12820 states and 65458 transitions. [2022-11-16 11:24:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:17,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:17,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:17,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:18,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:18,035 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash -784237210, now seen corresponding path program 1 times [2022-11-16 11:24:18,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290139762] [2022-11-16 11:24:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:18,037 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 [2022-11-16 11:24:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:18,037 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:18,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 11:24:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:24:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:18,565 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:24:18,565 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:24:18,584 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 130 treesize of output 126 [2022-11-16 11:24:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:18,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:19,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290139762] [2022-11-16 11:24:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290139762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:19,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:19,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:24:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317235191] [2022-11-16 11:24:19,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:24:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:24:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:24:19,321 INFO L87 Difference]: Start difference. First operand 12820 states and 65458 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:19,632 INFO L93 Difference]: Finished difference Result 12848 states and 65609 transitions. [2022-11-16 11:24:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:24:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-16 11:24:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:19,679 INFO L225 Difference]: With dead ends: 12848 [2022-11-16 11:24:19,679 INFO L226 Difference]: Without dead ends: 12848 [2022-11-16 11:24:19,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:24:19,680 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 11:24:19,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12848 states. [2022-11-16 11:24:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12848 to 12848. [2022-11-16 11:24:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12848 states, 12823 states have (on average 5.116509397176948) internal successors, (65609), 12847 states have internal predecessors, (65609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12848 states to 12848 states and 65609 transitions. [2022-11-16 11:24:20,175 INFO L78 Accepts]: Start accepts. Automaton has 12848 states and 65609 transitions. Word has length 13 [2022-11-16 11:24:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:20,175 INFO L495 AbstractCegarLoop]: Abstraction has 12848 states and 65609 transitions. [2022-11-16 11:24:20,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12848 states and 65609 transitions. [2022-11-16 11:24:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:20,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:20,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:20,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:20,377 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1070447310, now seen corresponding path program 1 times [2022-11-16 11:24:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:20,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807023222] [2022-11-16 11:24:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:24:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:20,379 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:20,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 11:24:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:24:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:24:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:20,879 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:24:20,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:24:20,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:24:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:24:21,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:24:21,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:21,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807023222] [2022-11-16 11:24:21,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807023222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:21,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:21,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:24:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077196487] [2022-11-16 11:24:21,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:21,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:24:21,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:24:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:24:21,908 INFO L87 Difference]: Start difference. First operand 12848 states and 65609 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:22,818 INFO L93 Difference]: Finished difference Result 13852 states and 69072 transitions. [2022-11-16 11:24:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:24:22,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-16 11:24:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:22,893 INFO L225 Difference]: With dead ends: 13852 [2022-11-16 11:24:22,893 INFO L226 Difference]: Without dead ends: 13852 [2022-11-16 11:24:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:24:22,893 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:22,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 13 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 46 Unchecked, 0.7s Time] [2022-11-16 11:24:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13852 states. [2022-11-16 11:24:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13852 to 12873. [2022-11-16 11:24:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12848 states have (on average 5.113714196762142) internal successors, (65701), 12872 states have internal predecessors, (65701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 65701 transitions. [2022-11-16 11:24:23,437 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 65701 transitions. Word has length 13 [2022-11-16 11:24:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:23,437 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 65701 transitions. [2022-11-16 11:24:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 65701 transitions. [2022-11-16 11:24:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:23,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:23,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:23,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-16 11:24:23,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:23,639 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1417421484, now seen corresponding path program 2 times [2022-11-16 11:24:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911913304] [2022-11-16 11:24:23,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:24:23,640 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 [2022-11-16 11:24:23,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:23,641 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:23,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 11:24:23,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:24:23,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:24:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:24,066 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:24:24,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:24:24,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:24:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:24:24,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:24:24,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911913304] [2022-11-16 11:24:24,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911913304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:24:24,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:24:24,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:24:24,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417102699] [2022-11-16 11:24:24,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:24:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:24:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:24:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:24:24,339 INFO L87 Difference]: Start difference. First operand 12873 states and 65701 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:24:24,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:24,750 INFO L93 Difference]: Finished difference Result 12862 states and 65657 transitions. [2022-11-16 11:24:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:24:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 13 [2022-11-16 11:24:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:24,810 INFO L225 Difference]: With dead ends: 12862 [2022-11-16 11:24:24,810 INFO L226 Difference]: Without dead ends: 12862 [2022-11-16 11:24:24,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:24:24,810 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:24,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:24:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12862 states. [2022-11-16 11:24:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12862 to 12835. [2022-11-16 11:24:25,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12810 states have (on average 5.118110850897736) internal successors, (65563), 12834 states have internal predecessors, (65563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 65563 transitions. [2022-11-16 11:24:25,135 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 65563 transitions. Word has length 13 [2022-11-16 11:24:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:25,135 INFO L495 AbstractCegarLoop]: Abstraction has 12835 states and 65563 transitions. [2022-11-16 11:24:25,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:24:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 65563 transitions. [2022-11-16 11:24:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:25,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:25,137 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:25,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:25,350 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash 318393821, now seen corresponding path program 2 times [2022-11-16 11:24:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:25,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023178205] [2022-11-16 11:24:25,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:24:25,351 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 [2022-11-16 11:24:25,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:25,352 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:25,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 11:24:25,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:24:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:24:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:25,882 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:24:25,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:24:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:27,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:27,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023178205] [2022-11-16 11:24:27,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023178205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:27,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:27,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:24:27,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822312741] [2022-11-16 11:24:27,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:27,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:24:27,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:24:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:24:27,974 INFO L87 Difference]: Start difference. First operand 12835 states and 65563 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:45,605 INFO L93 Difference]: Finished difference Result 24052 states and 119988 transitions. [2022-11-16 11:24:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:24:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-16 11:24:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:45,722 INFO L225 Difference]: With dead ends: 24052 [2022-11-16 11:24:45,722 INFO L226 Difference]: Without dead ends: 24052 [2022-11-16 11:24:45,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:24:45,723 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 549 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:45,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 68 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2022-11-16 11:24:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24052 states. [2022-11-16 11:24:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24052 to 15975. [2022-11-16 11:24:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15975 states, 15950 states have (on average 5.103009404388715) internal successors, (81393), 15974 states have internal predecessors, (81393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15975 states to 15975 states and 81393 transitions. [2022-11-16 11:24:46,593 INFO L78 Accepts]: Start accepts. Automaton has 15975 states and 81393 transitions. Word has length 13 [2022-11-16 11:24:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:46,594 INFO L495 AbstractCegarLoop]: Abstraction has 15975 states and 81393 transitions. [2022-11-16 11:24:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15975 states and 81393 transitions. [2022-11-16 11:24:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:24:46,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:46,596 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:46,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:46,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:46,809 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:24:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1218507175, now seen corresponding path program 3 times [2022-11-16 11:24:46,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:46,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666853871] [2022-11-16 11:24:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:24:46,810 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 [2022-11-16 11:24:46,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:46,810 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:24:46,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 11:24:47,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:24:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:47,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:24:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:47,400 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:24:47,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:24:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:47,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:48,017 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 8 treesize of output 6 [2022-11-16 11:24:48,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 11:24:48,056 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:24:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:50,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666853871] [2022-11-16 11:24:50,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666853871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:50,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:50,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:24:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345517267] [2022-11-16 11:24:50,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:24:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:24:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:24:50,274 INFO L87 Difference]: Start difference. First operand 15975 states and 81393 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:00,204 INFO L93 Difference]: Finished difference Result 30273 states and 151167 transitions. [2022-11-16 11:25:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:25:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-16 11:25:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:00,335 INFO L225 Difference]: With dead ends: 30273 [2022-11-16 11:25:00,335 INFO L226 Difference]: Without dead ends: 30273 [2022-11-16 11:25:00,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:25:00,335 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 323 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:00,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 82 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1345 Invalid, 0 Unknown, 529 Unchecked, 7.9s Time] [2022-11-16 11:25:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30273 states. [2022-11-16 11:25:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30273 to 22873. [2022-11-16 11:25:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22873 states, 22848 states have (on average 5.254945728291316) internal successors, (120065), 22872 states have internal predecessors, (120065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22873 states to 22873 states and 120065 transitions. [2022-11-16 11:25:01,120 INFO L78 Accepts]: Start accepts. Automaton has 22873 states and 120065 transitions. Word has length 13 [2022-11-16 11:25:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:01,120 INFO L495 AbstractCegarLoop]: Abstraction has 22873 states and 120065 transitions. [2022-11-16 11:25:01,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22873 states and 120065 transitions. [2022-11-16 11:25:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:25:01,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:01,122 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:01,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:01,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:01,327 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 238592253, now seen corresponding path program 2 times [2022-11-16 11:25:01,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071512608] [2022-11-16 11:25:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:01,328 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 [2022-11-16 11:25:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:01,328 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:01,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 11:25:01,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:01,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:25:01,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:01,807 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:25:01,807 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:25:01,834 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 130 treesize of output 126 [2022-11-16 11:25:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:02,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:02,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071512608] [2022-11-16 11:25:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071512608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:02,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:02,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:25:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094370481] [2022-11-16 11:25:02,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:02,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:02,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:02,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:02,139 INFO L87 Difference]: Start difference. First operand 22873 states and 120065 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:25:02,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:02,462 INFO L93 Difference]: Finished difference Result 22858 states and 120000 transitions. [2022-11-16 11:25:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:25:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 13 [2022-11-16 11:25:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:02,577 INFO L225 Difference]: With dead ends: 22858 [2022-11-16 11:25:02,577 INFO L226 Difference]: Without dead ends: 22858 [2022-11-16 11:25:02,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:02,577 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:02,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:25:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22858 states. [2022-11-16 11:25:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22858 to 22858. [2022-11-16 11:25:03,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22858 states, 22833 states have (on average 5.255551175929575) internal successors, (120000), 22857 states have internal predecessors, (120000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22858 states to 22858 states and 120000 transitions. [2022-11-16 11:25:03,402 INFO L78 Accepts]: Start accepts. Automaton has 22858 states and 120000 transitions. Word has length 13 [2022-11-16 11:25:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 22858 states and 120000 transitions. [2022-11-16 11:25:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-11-16 11:25:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22858 states and 120000 transitions. [2022-11-16 11:25:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:25:03,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:03,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:03,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 11:25:03,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:03,605 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1458450200, now seen corresponding path program 1 times [2022-11-16 11:25:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:03,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911276856] [2022-11-16 11:25:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:03,606 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 [2022-11-16 11:25:03,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:03,607 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:03,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 11:25:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:04,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:25:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:04,329 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:25:04,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:25:04,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:25:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:04,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:25:05,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:05,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911276856] [2022-11-16 11:25:05,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911276856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:05,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:05,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:25:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048191035] [2022-11-16 11:25:05,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:05,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:25:05,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:05,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:25:05,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:25:05,060 INFO L87 Difference]: Start difference. First operand 22858 states and 120000 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:05,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:05,585 INFO L93 Difference]: Finished difference Result 22883 states and 120068 transitions. [2022-11-16 11:25:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:25:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-16 11:25:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:05,680 INFO L225 Difference]: With dead ends: 22883 [2022-11-16 11:25:05,680 INFO L226 Difference]: Without dead ends: 22883 [2022-11-16 11:25:05,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:25:05,680 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:05,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 7 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-16 11:25:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22883 states. [2022-11-16 11:25:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22883 to 22861. [2022-11-16 11:25:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22861 states, 22836 states have (on average 5.254948327202662) internal successors, (120002), 22860 states have internal predecessors, (120002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22861 states to 22861 states and 120002 transitions. [2022-11-16 11:25:06,429 INFO L78 Accepts]: Start accepts. Automaton has 22861 states and 120002 transitions. Word has length 14 [2022-11-16 11:25:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:06,429 INFO L495 AbstractCegarLoop]: Abstraction has 22861 states and 120002 transitions. [2022-11-16 11:25:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 22861 states and 120002 transitions. [2022-11-16 11:25:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:25:06,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:06,431 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:06,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:06,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:06,632 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1530962199, now seen corresponding path program 2 times [2022-11-16 11:25:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620759074] [2022-11-16 11:25:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:06,633 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 [2022-11-16 11:25:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:06,634 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 11:25:06,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:25:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:25:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:07,166 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:25:07,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:25:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:07,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:08,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:08,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620759074] [2022-11-16 11:25:08,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620759074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:08,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:08,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:25:08,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079666284] [2022-11-16 11:25:08,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:08,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:25:08,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:25:08,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:25:08,884 INFO L87 Difference]: Start difference. First operand 22861 states and 120002 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:24,887 INFO L93 Difference]: Finished difference Result 33632 states and 173445 transitions. [2022-11-16 11:25:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:25:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-16 11:25:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:25,278 INFO L225 Difference]: With dead ends: 33632 [2022-11-16 11:25:25,279 INFO L226 Difference]: Without dead ends: 33632 [2022-11-16 11:25:25,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:25:25,279 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 734 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:25,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 7 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 11:25:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33632 states. [2022-11-16 11:25:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33632 to 25170. [2022-11-16 11:25:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25170 states, 25145 states have (on average 5.316563929210579) internal successors, (133685), 25169 states have internal predecessors, (133685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25170 states to 25170 states and 133685 transitions. [2022-11-16 11:25:26,243 INFO L78 Accepts]: Start accepts. Automaton has 25170 states and 133685 transitions. Word has length 14 [2022-11-16 11:25:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:26,243 INFO L495 AbstractCegarLoop]: Abstraction has 25170 states and 133685 transitions. [2022-11-16 11:25:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25170 states and 133685 transitions. [2022-11-16 11:25:26,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:25:26,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:26,245 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:26,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 11:25:26,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:26,446 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1179129731, now seen corresponding path program 1 times [2022-11-16 11:25:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695786106] [2022-11-16 11:25:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:26,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:26,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:26,448 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:26,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 11:25:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:26,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:25:26,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:26,953 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:25:26,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:25:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:27,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:29,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695786106] [2022-11-16 11:25:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695786106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:29,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:29,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:25:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662160212] [2022-11-16 11:25:29,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:29,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:25:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:25:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:25:29,065 INFO L87 Difference]: Start difference. First operand 25170 states and 133685 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:51,794 INFO L93 Difference]: Finished difference Result 59206 states and 299101 transitions. [2022-11-16 11:25:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:25:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-16 11:25:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:52,132 INFO L225 Difference]: With dead ends: 59206 [2022-11-16 11:25:52,132 INFO L226 Difference]: Without dead ends: 59206 [2022-11-16 11:25:52,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:25:52,133 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1524 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:52,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 110 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2022-11-16 11:25:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59206 states. [2022-11-16 11:25:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59206 to 28994. [2022-11-16 11:25:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28994 states, 28969 states have (on average 5.325002588974421) internal successors, (154260), 28993 states have internal predecessors, (154260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28994 states to 28994 states and 154260 transitions. [2022-11-16 11:25:53,924 INFO L78 Accepts]: Start accepts. Automaton has 28994 states and 154260 transitions. Word has length 14 [2022-11-16 11:25:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:53,924 INFO L495 AbstractCegarLoop]: Abstraction has 28994 states and 154260 transitions. [2022-11-16 11:25:53,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 28994 states and 154260 transitions. [2022-11-16 11:25:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:25:53,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:53,927 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:53,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:54,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:54,134 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1193576458, now seen corresponding path program 2 times [2022-11-16 11:25:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736942946] [2022-11-16 11:25:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:54,135 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 [2022-11-16 11:25:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:54,136 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:54,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 11:25:54,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:54,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:25:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:54,638 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:25:54,638 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:25:54,674 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 130 treesize of output 126 [2022-11-16 11:25:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:54,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:54,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:54,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736942946] [2022-11-16 11:25:54,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736942946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:54,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:54,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:25:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019174465] [2022-11-16 11:25:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:54,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:54,969 INFO L87 Difference]: Start difference. First operand 28994 states and 154260 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:25:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:55,318 INFO L93 Difference]: Finished difference Result 28980 states and 154198 transitions. [2022-11-16 11:25:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:25:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 11:25:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:55,453 INFO L225 Difference]: With dead ends: 28980 [2022-11-16 11:25:55,453 INFO L226 Difference]: Without dead ends: 28980 [2022-11-16 11:25:55,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:55,453 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:25:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28980 states. [2022-11-16 11:25:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28980 to 28980. [2022-11-16 11:25:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28980 states, 28955 states have (on average 5.3254360214125365) internal successors, (154198), 28979 states have internal predecessors, (154198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28980 states to 28980 states and 154198 transitions. [2022-11-16 11:25:56,888 INFO L78 Accepts]: Start accepts. Automaton has 28980 states and 154198 transitions. Word has length 14 [2022-11-16 11:25:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:56,889 INFO L495 AbstractCegarLoop]: Abstraction has 28980 states and 154198 transitions. [2022-11-16 11:25:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 11:25:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 28980 states and 154198 transitions. [2022-11-16 11:25:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:25:56,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:56,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:56,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:57,099 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:25:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash -159140585, now seen corresponding path program 4 times [2022-11-16 11:25:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:57,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56205785] [2022-11-16 11:25:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:25:57,100 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 [2022-11-16 11:25:57,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:57,101 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:25:57,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 11:25:57,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:25:57,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:25:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:57,622 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:25:57,622 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:25:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:25:58,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:00,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56205785] [2022-11-16 11:26:00,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56205785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:00,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:00,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:26:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586985147] [2022-11-16 11:26:00,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:00,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:26:00,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:26:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:26:00,201 INFO L87 Difference]: Start difference. First operand 28980 states and 154198 transitions. Second operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:38,953 INFO L93 Difference]: Finished difference Result 51908 states and 260594 transitions. [2022-11-16 11:26:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:26:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-16 11:26:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:39,207 INFO L225 Difference]: With dead ends: 51908 [2022-11-16 11:26:39,207 INFO L226 Difference]: Without dead ends: 51908 [2022-11-16 11:26:39,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=528, Invalid=2334, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:26:39,208 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2363 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 5065 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2363 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:39,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2363 Valid, 239 Invalid, 5106 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 5065 Invalid, 0 Unknown, 0 Unchecked, 27.4s Time] [2022-11-16 11:26:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51908 states. [2022-11-16 11:26:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51908 to 27705. [2022-11-16 11:26:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27705 states, 27680 states have (on average 5.236054913294797) internal successors, (144934), 27704 states have internal predecessors, (144934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27705 states to 27705 states and 144934 transitions. [2022-11-16 11:26:40,763 INFO L78 Accepts]: Start accepts. Automaton has 27705 states and 144934 transitions. Word has length 14 [2022-11-16 11:26:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:40,763 INFO L495 AbstractCegarLoop]: Abstraction has 27705 states and 144934 transitions. [2022-11-16 11:26:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27705 states and 144934 transitions. [2022-11-16 11:26:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:26:40,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:40,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:40,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:40,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:40,971 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:26:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:40,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1208408872, now seen corresponding path program 2 times [2022-11-16 11:26:40,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9071033] [2022-11-16 11:26:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:40,972 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 [2022-11-16 11:26:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:40,973 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:26:40,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 11:26:41,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:41,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:26:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:26:41,473 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:26:41,473 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:26:41,499 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 250 treesize of output 242 [2022-11-16 11:26:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:41,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:41,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:41,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9071033] [2022-11-16 11:26:41,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9071033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:41,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:41,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:26:41,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307681341] [2022-11-16 11:26:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:41,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:26:41,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:26:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:26:41,800 INFO L87 Difference]: Start difference. First operand 27705 states and 144934 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:26:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:42,081 INFO L93 Difference]: Finished difference Result 27701 states and 144926 transitions. [2022-11-16 11:26:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:26:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 15 [2022-11-16 11:26:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:42,194 INFO L225 Difference]: With dead ends: 27701 [2022-11-16 11:26:42,194 INFO L226 Difference]: Without dead ends: 27701 [2022-11-16 11:26:42,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:26:42,195 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:42,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-16 11:26:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27701 states. [2022-11-16 11:26:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27701 to 27698. [2022-11-16 11:26:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27698 states, 27673 states have (on average 5.2369096230983265) internal successors, (144921), 27697 states have internal predecessors, (144921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27698 states to 27698 states and 144921 transitions. [2022-11-16 11:26:43,587 INFO L78 Accepts]: Start accepts. Automaton has 27698 states and 144921 transitions. Word has length 15 [2022-11-16 11:26:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 27698 states and 144921 transitions. [2022-11-16 11:26:43,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:26:43,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27698 states and 144921 transitions. [2022-11-16 11:26:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:26:43,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:43,592 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:43,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:43,804 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:26:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2129201888, now seen corresponding path program 3 times [2022-11-16 11:26:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:43,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112691028] [2022-11-16 11:26:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:26:43,805 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 [2022-11-16 11:26:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:43,807 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:26:43,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 11:26:44,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:26:44,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:26:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:44,418 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:26:44,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:26:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:45,017 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 8 treesize of output 6 [2022-11-16 11:26:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 11:26:45,058 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:26:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:47,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:47,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112691028] [2022-11-16 11:26:47,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112691028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:47,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:47,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:26:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677243626] [2022-11-16 11:26:47,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:47,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:26:47,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:26:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:26:47,090 INFO L87 Difference]: Start difference. First operand 27698 states and 144921 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:09,522 INFO L93 Difference]: Finished difference Result 61077 states and 310238 transitions. [2022-11-16 11:27:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:27:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:27:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:10,202 INFO L225 Difference]: With dead ends: 61077 [2022-11-16 11:27:10,202 INFO L226 Difference]: Without dead ends: 61077 [2022-11-16 11:27:10,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:27:10,203 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 950 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:10,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 84 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2038 Invalid, 0 Unknown, 269 Unchecked, 16.7s Time] [2022-11-16 11:27:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61077 states. [2022-11-16 11:27:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61077 to 41270. [2022-11-16 11:27:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41270 states, 41245 states have (on average 5.359510243665899) internal successors, (221053), 41269 states have internal predecessors, (221053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41270 states to 41270 states and 221053 transitions. [2022-11-16 11:27:12,262 INFO L78 Accepts]: Start accepts. Automaton has 41270 states and 221053 transitions. Word has length 15 [2022-11-16 11:27:12,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:12,262 INFO L495 AbstractCegarLoop]: Abstraction has 41270 states and 221053 transitions. [2022-11-16 11:27:12,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 41270 states and 221053 transitions. [2022-11-16 11:27:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:27:12,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:12,266 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:12,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:12,467 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:27:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 4508044, now seen corresponding path program 5 times [2022-11-16 11:27:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:12,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769117249] [2022-11-16 11:27:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:27:12,468 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 [2022-11-16 11:27:12,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:12,475 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:27:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 11:27:12,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:27:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:12,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:27:12,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:13,026 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:27:13,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:27:13,480 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 7 treesize of output 5 [2022-11-16 11:27:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:27:13,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:13,828 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 8 treesize of output 6 [2022-11-16 11:27:13,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-16 11:27:13,874 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:27:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:16,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769117249] [2022-11-16 11:27:16,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769117249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:16,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:16,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2022-11-16 11:27:16,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092966269] [2022-11-16 11:27:16,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:16,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:27:16,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:16,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:27:16,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:27:16,159 INFO L87 Difference]: Start difference. First operand 41270 states and 221053 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:30,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:30,374 INFO L93 Difference]: Finished difference Result 52260 states and 275580 transitions. [2022-11-16 11:27:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:27:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:27:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:30,685 INFO L225 Difference]: With dead ends: 52260 [2022-11-16 11:27:30,685 INFO L226 Difference]: Without dead ends: 52260 [2022-11-16 11:27:30,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:27:30,686 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 626 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1059 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:30,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 151 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1791 Invalid, 0 Unknown, 1059 Unchecked, 9.5s Time] [2022-11-16 11:27:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52260 states. [2022-11-16 11:27:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52260 to 44648. [2022-11-16 11:27:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44648 states, 44623 states have (on average 5.375815162584318) internal successors, (239885), 44647 states have internal predecessors, (239885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44648 states to 44648 states and 239885 transitions. [2022-11-16 11:27:32,594 INFO L78 Accepts]: Start accepts. Automaton has 44648 states and 239885 transitions. Word has length 15 [2022-11-16 11:27:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:32,595 INFO L495 AbstractCegarLoop]: Abstraction has 44648 states and 239885 transitions. [2022-11-16 11:27:32,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 44648 states and 239885 transitions. [2022-11-16 11:27:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:27:32,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:32,599 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:32,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:32,799 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:27:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1653835462, now seen corresponding path program 2 times [2022-11-16 11:27:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910727606] [2022-11-16 11:27:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:32,800 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 [2022-11-16 11:27:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:32,801 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:27:32,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 11:27:33,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:27:33,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:27:33,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:33,300 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:27:33,301 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:27:33,318 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 130 treesize of output 126 [2022-11-16 11:27:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:33,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:27:33,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:33,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910727606] [2022-11-16 11:27:33,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910727606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:27:33,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:27:33,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:27:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835730689] [2022-11-16 11:27:33,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:27:33,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:27:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:27:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:27:33,636 INFO L87 Difference]: Start difference. First operand 44648 states and 239885 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:27:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:34,492 INFO L93 Difference]: Finished difference Result 44550 states and 239358 transitions. [2022-11-16 11:27:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:27:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 15 [2022-11-16 11:27:34,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:34,737 INFO L225 Difference]: With dead ends: 44550 [2022-11-16 11:27:34,737 INFO L226 Difference]: Without dead ends: 44550 [2022-11-16 11:27:34,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:27:34,737 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:34,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:27:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44550 states. [2022-11-16 11:27:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44550 to 44550. [2022-11-16 11:27:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44550 states, 44525 states have (on average 5.375811341942729) internal successors, (239358), 44549 states have internal predecessors, (239358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44550 states to 44550 states and 239358 transitions. [2022-11-16 11:27:36,587 INFO L78 Accepts]: Start accepts. Automaton has 44550 states and 239358 transitions. Word has length 15 [2022-11-16 11:27:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:36,587 INFO L495 AbstractCegarLoop]: Abstraction has 44550 states and 239358 transitions. [2022-11-16 11:27:36,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2022-11-16 11:27:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44550 states and 239358 transitions. [2022-11-16 11:27:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:27:36,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:36,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:36,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:36,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:36,795 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:27:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1194030628, now seen corresponding path program 1 times [2022-11-16 11:27:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215546991] [2022-11-16 11:27:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:36,796 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 [2022-11-16 11:27:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:36,796 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:27:36,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 11:27:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:27:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:37,318 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:27:37,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:27:37,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:27:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:38,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:39,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215546991] [2022-11-16 11:27:39,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215546991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:39,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:39,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:27:39,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790983614] [2022-11-16 11:27:39,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:39,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:27:39,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:39,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:27:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:27:39,327 INFO L87 Difference]: Start difference. First operand 44550 states and 239358 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:42,821 INFO L93 Difference]: Finished difference Result 65907 states and 335059 transitions. [2022-11-16 11:27:42,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:27:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:27:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:43,779 INFO L225 Difference]: With dead ends: 65907 [2022-11-16 11:27:43,779 INFO L226 Difference]: Without dead ends: 65907 [2022-11-16 11:27:43,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:27:43,780 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 238 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:43,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 23 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 404 Invalid, 0 Unknown, 532 Unchecked, 2.5s Time] [2022-11-16 11:27:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65907 states. [2022-11-16 11:27:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65907 to 44600. [2022-11-16 11:27:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44600 states, 44575 states have (on average 5.373954010095345) internal successors, (239544), 44599 states have internal predecessors, (239544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44600 states to 44600 states and 239544 transitions. [2022-11-16 11:27:46,096 INFO L78 Accepts]: Start accepts. Automaton has 44600 states and 239544 transitions. Word has length 16 [2022-11-16 11:27:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:46,096 INFO L495 AbstractCegarLoop]: Abstraction has 44600 states and 239544 transitions. [2022-11-16 11:27:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44600 states and 239544 transitions. [2022-11-16 11:27:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:27:46,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:46,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:46,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:46,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:46,301 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:27:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash 16021336, now seen corresponding path program 2 times [2022-11-16 11:27:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:46,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162705199] [2022-11-16 11:27:46,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:46,302 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 [2022-11-16 11:27:46,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:46,303 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:27:46,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 11:27:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:27:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:46,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:27:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:46,778 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:27:46,778 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:27:46,807 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 250 treesize of output 242 [2022-11-16 11:27:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:47,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:27:47,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162705199] [2022-11-16 11:27:47,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162705199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:27:47,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:27:47,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:27:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358314398] [2022-11-16 11:27:47,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:27:47,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:27:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:27:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:27:47,115 INFO L87 Difference]: Start difference. First operand 44600 states and 239544 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:48,056 INFO L93 Difference]: Finished difference Result 44590 states and 239508 transitions. [2022-11-16 11:27:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:27:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 16 [2022-11-16 11:27:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:48,319 INFO L225 Difference]: With dead ends: 44590 [2022-11-16 11:27:48,319 INFO L226 Difference]: Without dead ends: 44590 [2022-11-16 11:27:48,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:27:48,320 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:48,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-16 11:27:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44590 states. [2022-11-16 11:27:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44590 to 44577. [2022-11-16 11:27:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44577 states, 44552 states have (on average 5.375202011133058) internal successors, (239476), 44576 states have internal predecessors, (239476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44577 states to 44577 states and 239476 transitions. [2022-11-16 11:27:50,194 INFO L78 Accepts]: Start accepts. Automaton has 44577 states and 239476 transitions. Word has length 16 [2022-11-16 11:27:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:50,194 INFO L495 AbstractCegarLoop]: Abstraction has 44577 states and 239476 transitions. [2022-11-16 11:27:50,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 44577 states and 239476 transitions. [2022-11-16 11:27:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:27:50,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:50,218 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:50,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:50,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:50,430 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:27:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1046363121, now seen corresponding path program 1 times [2022-11-16 11:27:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:50,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905912547] [2022-11-16 11:27:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:50,431 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 [2022-11-16 11:27:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:50,432 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:27:50,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 11:27:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:50,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:27:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:50,962 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:27:50,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:27:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:51,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:27:53,093 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905912547] [2022-11-16 11:27:53,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905912547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:53,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:53,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:27:53,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019532222] [2022-11-16 11:27:53,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:53,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:27:53,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:27:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:27:53,095 INFO L87 Difference]: Start difference. First operand 44577 states and 239476 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:14,150 INFO L93 Difference]: Finished difference Result 64424 states and 325942 transitions. [2022-11-16 11:28:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:28:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:28:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:14,498 INFO L225 Difference]: With dead ends: 64424 [2022-11-16 11:28:14,498 INFO L226 Difference]: Without dead ends: 64424 [2022-11-16 11:28:14,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:28:14,499 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1147 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2885 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:14,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 118 Invalid, 2910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2885 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-11-16 11:28:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64424 states. [2022-11-16 11:28:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64424 to 44143. [2022-11-16 11:28:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44143 states, 44118 states have (on average 5.352123849675869) internal successors, (236125), 44142 states have internal predecessors, (236125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44143 states to 44143 states and 236125 transitions. [2022-11-16 11:28:16,699 INFO L78 Accepts]: Start accepts. Automaton has 44143 states and 236125 transitions. Word has length 16 [2022-11-16 11:28:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:16,700 INFO L495 AbstractCegarLoop]: Abstraction has 44143 states and 236125 transitions. [2022-11-16 11:28:16,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 44143 states and 236125 transitions. [2022-11-16 11:28:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:28:16,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:16,704 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:16,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:16,905 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-11-16 11:28:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1895512928, now seen corresponding path program 3 times [2022-11-16 11:28:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:16,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913349447] [2022-11-16 11:28:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:28:16,906 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 [2022-11-16 11:28:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:16,907 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:28:16,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44f0938b-51e5-470e-a289-f90bf339f7b6/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 11:28:17,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:28:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:28:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:17,585 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:28:17,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62