./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN --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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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-6b4ec56 [2022-11-20 10:50:27,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:27,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:27,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:27,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:27,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:27,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:27,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:27,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:27,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:27,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:27,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:27,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:27,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:27,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:27,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:27,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:27,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:27,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:27,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:27,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:27,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:27,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:27,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:27,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:27,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:27,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:27,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:27,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:27,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:27,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:27,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:27,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:27,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:27,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:27,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:27,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:27,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:27,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:27,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:27,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:27,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:50:27,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:27,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:27,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:27,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:27,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:27,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:27,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:27,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:27,505 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:27,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:27,506 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:27,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:50:27,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:27,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:27,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:27,508 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:50:27,508 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:50:27,508 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:50:27,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:27,509 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:50:27,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:27,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:27,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:27,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:27,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:27,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:27,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:27,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:27,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:50:27,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:50:27,513 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_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-20 10:50:27,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:27,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:27,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:27,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:27,936 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:27,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 10:50:30,959 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:31,158 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:31,158 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 10:50:31,166 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/ff48da14f/bd367d85efa04301bd914f7b7389ef36/FLAG2e4a9e7e9 [2022-11-20 10:50:31,181 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/ff48da14f/bd367d85efa04301bd914f7b7389ef36 [2022-11-20 10:50:31,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:31,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:31,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:31,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:31,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:31,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70198506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31, skipping insertion in model container [2022-11-20 10:50:31,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:31,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:31,484 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 10:50:31,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:31,510 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) [2022-11-20 10:50:31,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54fc961f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31, skipping insertion in model container [2022-11-20 10:50:31,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:31,512 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 10:50:31,513 INFO L158 Benchmark]: Toolchain (without parser) took 327.87ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 135.3MB in the end (delta: -413.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:50:31,514 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 96.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:50:31,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.32ms. Allocated memory is still 172.0MB. Free memory was 134.3MB in the beginning and 135.3MB in the end (delta: -1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:50:31,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 96.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.32ms. Allocated memory is still 172.0MB. Free memory was 134.3MB in the beginning and 135.3MB in the end (delta: -1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN --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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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-6b4ec56 [2022-11-20 10:50:33,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:33,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:33,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:33,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:33,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:33,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:33,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:33,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:33,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:33,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:33,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:33,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:33,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:33,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:33,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:33,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:33,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:33,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:33,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:33,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:33,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:33,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:33,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:33,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:33,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:33,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:33,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:33,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:33,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:33,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:33,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:33,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:33,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:33,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:33,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:33,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:33,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:33,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:33,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:33,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:33,946 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 10:50:33,989 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:33,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:33,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:33,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:33,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:33,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:33,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:33,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:33,994 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:33,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:33,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:33,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:50:33,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:33,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:33,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:33,997 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:50:33,997 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:50:33,998 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:50:33,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:33,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:50:33,999 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 10:50:33,999 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 10:50:33,999 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:33,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:34,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:34,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:34,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:34,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:34,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:34,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:34,002 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 10:50:34,003 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 10:50:34,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 10:50:34,004 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_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-20 10:50:34,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:34,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:34,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:34,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:34,472 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:34,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 10:50:37,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:37,771 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:37,771 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 10:50:37,785 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/ee413da59/244203398ce64b7185d08753c7513e46/FLAG52f8a0bf6 [2022-11-20 10:50:37,814 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/data/ee413da59/244203398ce64b7185d08753c7513e46 [2022-11-20 10:50:37,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:37,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:37,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:37,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:37,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:37,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:37" (1/1) ... [2022-11-20 10:50:37,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6779d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:37, skipping insertion in model container [2022-11-20 10:50:37,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:37" (1/1) ... [2022-11-20 10:50:37,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:37,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:38,154 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 10:50:38,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:38,195 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 10:50:38,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:38,232 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 10:50:38,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:38,259 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:38,302 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 10:50:38,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:38,328 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:38,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38 WrapperNode [2022-11-20 10:50:38,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:38,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:38,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:38,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:38,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,410 INFO L138 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2022-11-20 10:50:38,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:38,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:38,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:38,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:38,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:38,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:38,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:38,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:38,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (1/1) ... [2022-11-20 10:50:38,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:38,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:38,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:38,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 10:50:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:50:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 10:50:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:50:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:50:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:50:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:50:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:50:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:50:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:50:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:50:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:50:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:38,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:50:38,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 10:50:38,576 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:50:38,713 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:38,715 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:50:39,414 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:50:39,775 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:50:39,775 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 10:50:39,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:39 BoogieIcfgContainer [2022-11-20 10:50:39,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:50:39,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:50:39,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:50:39,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:50:39,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:37" (1/3) ... [2022-11-20 10:50:39,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482bf08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:39, skipping insertion in model container [2022-11-20 10:50:39,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:38" (2/3) ... [2022-11-20 10:50:39,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482bf08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:39, skipping insertion in model container [2022-11-20 10:50:39,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:39" (3/3) ... [2022-11-20 10:50:39,792 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-11-20 10:50:39,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:50:39,812 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-20 10:50:39,812 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:50:39,956 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:50:40,005 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:50:40,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-20 10:50:40,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-20 10:50:40,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 378 flow [2022-11-20 10:50:40,150 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2022-11-20 10:50:40,150 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:50:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 12/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-11-20 10:50:40,161 INFO L119 LiptonReduction]: Number of co-enabled transitions 2418 [2022-11-20 10:51:11,015 INFO L134 LiptonReduction]: Checked pairs total: 3808 [2022-11-20 10:51:11,015 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-11-20 10:51:11,022 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 51 transitions, 126 flow [2022-11-20 10:51:11,134 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:11,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:51:11,159 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;@6cc48cc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:51:11,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 10:51:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:51:11,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:11,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:51:11,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash 27162, now seen corresponding path program 1 times [2022-11-20 10:51:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839746326] [2022-11-20 10:51:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:11,206 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 [2022-11-20 10:51:11,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:11,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:11,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:11,537 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-20 10:51:11,538 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-20 10:51:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:11,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:11,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839746326] [2022-11-20 10:51:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839746326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:11,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:11,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700861423] [2022-11-20 10:51:11,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:11,637 INFO L87 Difference]: Start difference. First operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 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) [2022-11-20 10:51:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:11,915 INFO L93 Difference]: Finished difference Result 1038 states and 3595 transitions. [2022-11-20 10:51:11,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:11,918 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 [2022-11-20 10:51:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:11,948 INFO L225 Difference]: With dead ends: 1038 [2022-11-20 10:51:11,948 INFO L226 Difference]: Without dead ends: 1038 [2022-11-20 10:51:11,949 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 [2022-11-20 10:51:11,952 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:11,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-20 10:51:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-20 10:51:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2022-11-20 10:51:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.972375690607735) internal successors, (3595), 1037 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3595 transitions. [2022-11-20 10:51:12,073 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3595 transitions. Word has length 2 [2022-11-20 10:51:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:12,074 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3595 transitions. [2022-11-20 10:51:12,074 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) [2022-11-20 10:51:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3595 transitions. [2022-11-20 10:51:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:51:12,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:12,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:51:12,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:12,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:12,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:12,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash 27163, now seen corresponding path program 1 times [2022-11-20 10:51:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:12,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111954862] [2022-11-20 10:51:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:12,290 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 [2022-11-20 10:51:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:12,293 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:12,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:51:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:12,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:12,588 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 10:51:12,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 10:51:12,629 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 10:51:12,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 10:51:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:12,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:12,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111954862] [2022-11-20 10:51:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111954862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:12,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:12,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:12,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268647388] [2022-11-20 10:51:12,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:12,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:12,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:12,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:12,681 INFO L87 Difference]: Start difference. First operand 1038 states and 3595 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) [2022-11-20 10:51:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:12,878 INFO L93 Difference]: Finished difference Result 1038 states and 3594 transitions. [2022-11-20 10:51:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:12,879 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 [2022-11-20 10:51:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:12,888 INFO L225 Difference]: With dead ends: 1038 [2022-11-20 10:51:12,889 INFO L226 Difference]: Without dead ends: 1038 [2022-11-20 10:51:12,889 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 [2022-11-20 10:51:12,891 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:12,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-20 10:51:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-20 10:51:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2022-11-20 10:51:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.971270718232044) internal successors, (3594), 1037 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3594 transitions. [2022-11-20 10:51:12,954 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3594 transitions. Word has length 2 [2022-11-20 10:51:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:12,954 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3594 transitions. [2022-11-20 10:51:12,954 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) [2022-11-20 10:51:12,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3594 transitions. [2022-11-20 10:51:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:51:12,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:12,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:51:12,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:13,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:13,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 27003, now seen corresponding path program 1 times [2022-11-20 10:51:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154099998] [2022-11-20 10:51:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:13,169 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 [2022-11-20 10:51:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:13,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:13,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:51:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:13,370 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:51:13,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:51:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:13,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:13,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:13,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154099998] [2022-11-20 10:51:13,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154099998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:13,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:13,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564688457] [2022-11-20 10:51:13,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:13,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:13,403 INFO L87 Difference]: Start difference. First operand 1038 states and 3594 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) [2022-11-20 10:51:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:13,633 INFO L93 Difference]: Finished difference Result 1037 states and 3592 transitions. [2022-11-20 10:51:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:13,634 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 [2022-11-20 10:51:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:13,643 INFO L225 Difference]: With dead ends: 1037 [2022-11-20 10:51:13,644 INFO L226 Difference]: Without dead ends: 1037 [2022-11-20 10:51:13,644 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 [2022-11-20 10:51:13,653 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:13,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-11-20 10:51:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-11-20 10:51:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 3.969060773480663) internal successors, (3592), 1036 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3592 transitions. [2022-11-20 10:51:13,701 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3592 transitions. Word has length 2 [2022-11-20 10:51:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:13,702 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3592 transitions. [2022-11-20 10:51:13,702 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) [2022-11-20 10:51:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3592 transitions. [2022-11-20 10:51:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:51:13,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:13,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:51:13,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:13,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 27004, now seen corresponding path program 1 times [2022-11-20 10:51:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:13,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121434732] [2022-11-20 10:51:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:13,920 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 [2022-11-20 10:51:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:13,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:13,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:51:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:14,160 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:14,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:14,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:14,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121434732] [2022-11-20 10:51:14,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121434732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:14,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:14,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674470605] [2022-11-20 10:51:14,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:14,246 INFO L87 Difference]: Start difference. First operand 1037 states and 3592 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) [2022-11-20 10:51:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:14,686 INFO L93 Difference]: Finished difference Result 2068 states and 7174 transitions. [2022-11-20 10:51:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:14,687 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 [2022-11-20 10:51:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:14,703 INFO L225 Difference]: With dead ends: 2068 [2022-11-20 10:51:14,703 INFO L226 Difference]: Without dead ends: 2068 [2022-11-20 10:51:14,704 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 [2022-11-20 10:51:14,704 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:14,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:51:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-20 10:51:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1037. [2022-11-20 10:51:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 3.9679558011049725) internal successors, (3591), 1036 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3591 transitions. [2022-11-20 10:51:14,760 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3591 transitions. Word has length 2 [2022-11-20 10:51:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:14,760 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3591 transitions. [2022-11-20 10:51:14,760 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) [2022-11-20 10:51:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3591 transitions. [2022-11-20 10:51:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:51:14,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:14,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:51:14,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:14,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash 841749, now seen corresponding path program 1 times [2022-11-20 10:51:14,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:14,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003709064] [2022-11-20 10:51:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:14,974 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 [2022-11-20 10:51:14,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:14,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:14,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:51:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:15,190 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 10:51:15,191 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 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 10:51:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:15,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:15,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003709064] [2022-11-20 10:51:15,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003709064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:15,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:15,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106106661] [2022-11-20 10:51:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:15,297 INFO L87 Difference]: Start difference. First operand 1037 states and 3591 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) [2022-11-20 10:51:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:15,470 INFO L93 Difference]: Finished difference Result 1036 states and 3590 transitions. [2022-11-20 10:51:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:15,470 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 [2022-11-20 10:51:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:15,478 INFO L225 Difference]: With dead ends: 1036 [2022-11-20 10:51:15,478 INFO L226 Difference]: Without dead ends: 1036 [2022-11-20 10:51:15,479 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 [2022-11-20 10:51:15,481 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:15,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 10:51:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-20 10:51:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2022-11-20 10:51:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 905 states have (on average 3.9668508287292816) internal successors, (3590), 1035 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3590 transitions. [2022-11-20 10:51:15,536 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3590 transitions. Word has length 3 [2022-11-20 10:51:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 3590 transitions. [2022-11-20 10:51:15,540 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) [2022-11-20 10:51:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3590 transitions. [2022-11-20 10:51:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:51:15,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:15,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:51:15,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:15,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:15,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:15,753 INFO L85 PathProgramCache]: Analyzing trace with hash 841750, now seen corresponding path program 1 times [2022-11-20 10:51:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:15,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032565456] [2022-11-20 10:51:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:15,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:15,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:15,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:51:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:15,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:15,980 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 10:51:15,980 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-20 10:51:16,002 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 10:51:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 10:51:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:16,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:16,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:16,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032565456] [2022-11-20 10:51:16,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032565456] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:16,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:51:16,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-20 10:51:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185550058] [2022-11-20 10:51:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:16,237 INFO L87 Difference]: Start difference. First operand 1036 states and 3590 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:16,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:16,542 INFO L93 Difference]: Finished difference Result 855 states and 2869 transitions. [2022-11-20 10:51:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:51:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:16,548 INFO L225 Difference]: With dead ends: 855 [2022-11-20 10:51:16,549 INFO L226 Difference]: Without dead ends: 855 [2022-11-20 10:51:16,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:16,549 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:16,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-20 10:51:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2022-11-20 10:51:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 752 states have (on average 3.815159574468085) internal successors, (2869), 854 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2869 transitions. [2022-11-20 10:51:16,597 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2869 transitions. Word has length 3 [2022-11-20 10:51:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:16,597 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 2869 transitions. [2022-11-20 10:51:16,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2869 transitions. [2022-11-20 10:51:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:51:16,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:16,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:51:16,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:16,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:16,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash 841591, now seen corresponding path program 1 times [2022-11-20 10:51:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:16,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130700993] [2022-11-20 10:51:16,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:16,811 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 [2022-11-20 10:51:16,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:16,813 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:16,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:17,045 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:17,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:17,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:17,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130700993] [2022-11-20 10:51:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130700993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:17,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:17,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 10:51:17,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445949668] [2022-11-20 10:51:17,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:17,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:51:17,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:51:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:17,427 INFO L87 Difference]: Start difference. First operand 855 states and 2869 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) [2022-11-20 10:51:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:18,191 INFO L93 Difference]: Finished difference Result 2560 states and 8601 transitions. [2022-11-20 10:51:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:18,192 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 [2022-11-20 10:51:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:18,210 INFO L225 Difference]: With dead ends: 2560 [2022-11-20 10:51:18,210 INFO L226 Difference]: Without dead ends: 2560 [2022-11-20 10:51:18,210 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 [2022-11-20 10:51:18,211 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 235 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:18,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 12 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:51:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-11-20 10:51:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 858. [2022-11-20 10:51:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 755 states have (on average 3.80794701986755) internal successors, (2875), 857 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2875 transitions. [2022-11-20 10:51:18,294 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2875 transitions. Word has length 3 [2022-11-20 10:51:18,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:18,295 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 2875 transitions. [2022-11-20 10:51:18,295 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) [2022-11-20 10:51:18,295 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2875 transitions. [2022-11-20 10:51:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:51:18,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:18,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:51:18,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:18,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash 26125162, now seen corresponding path program 1 times [2022-11-20 10:51:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:18,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238987936] [2022-11-20 10:51:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:18,508 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 [2022-11-20 10:51:18,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:18,510 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:18,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:18,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:18,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:18,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:18,726 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:51:18,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:51:18,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:51:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:18,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:18,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238987936] [2022-11-20 10:51:18,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238987936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:18,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:18,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:18,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963669286] [2022-11-20 10:51:18,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:18,829 INFO L87 Difference]: Start difference. First operand 858 states and 2875 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:18,968 INFO L93 Difference]: Finished difference Result 861 states and 2885 transitions. [2022-11-20 10:51:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-20 10:51:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:18,975 INFO L225 Difference]: With dead ends: 861 [2022-11-20 10:51:18,975 INFO L226 Difference]: Without dead ends: 861 [2022-11-20 10:51:18,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:18,976 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:18,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 10:51:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-20 10:51:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-20 10:51:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 758 states have (on average 3.8060686015831133) internal successors, (2885), 860 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2885 transitions. [2022-11-20 10:51:19,008 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2885 transitions. Word has length 4 [2022-11-20 10:51:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:19,009 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2885 transitions. [2022-11-20 10:51:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2885 transitions. [2022-11-20 10:51:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:51:19,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:19,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:51:19,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:19,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:19,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash 26125163, now seen corresponding path program 1 times [2022-11-20 10:51:19,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:19,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637184070] [2022-11-20 10:51:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:19,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:19,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:19,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:19,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:51:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:19,410 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:51:19,410 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 10:51:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:19,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:19,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637184070] [2022-11-20 10:51:19,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637184070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:19,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:19,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528280275] [2022-11-20 10:51:19,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:19,524 INFO L87 Difference]: Start difference. First operand 861 states and 2885 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:19,660 INFO L93 Difference]: Finished difference Result 861 states and 2883 transitions. [2022-11-20 10:51:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-20 10:51:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:19,667 INFO L225 Difference]: With dead ends: 861 [2022-11-20 10:51:19,667 INFO L226 Difference]: Without dead ends: 861 [2022-11-20 10:51:19,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:19,668 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:19,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 10:51:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-20 10:51:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-20 10:51:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 758 states have (on average 3.8034300791556728) internal successors, (2883), 860 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2883 transitions. [2022-11-20 10:51:19,702 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2883 transitions. Word has length 4 [2022-11-20 10:51:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:19,703 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2883 transitions. [2022-11-20 10:51:19,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2883 transitions. [2022-11-20 10:51:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:51:19,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:19,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:51:19,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:19,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 808943269, now seen corresponding path program 1 times [2022-11-20 10:51:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745862928] [2022-11-20 10:51:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:19,917 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 [2022-11-20 10:51:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:19,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:19,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:20,178 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 10:51:20,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 10:51:20,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:51:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:20,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745862928] [2022-11-20 10:51:20,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745862928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:20,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:20,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 10:51:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357336381] [2022-11-20 10:51:20,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:51:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:20,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:51:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:51:20,724 INFO L87 Difference]: Start difference. First operand 861 states and 2883 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) [2022-11-20 10:51:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,148 INFO L93 Difference]: Finished difference Result 1636 states and 5531 transitions. [2022-11-20 10:51:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:21,148 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 [2022-11-20 10:51:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,160 INFO L225 Difference]: With dead ends: 1636 [2022-11-20 10:51:21,160 INFO L226 Difference]: Without dead ends: 1636 [2022-11-20 10:51:21,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:51:21,161 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 24 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-11-20 10:51:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-11-20 10:51:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 831. [2022-11-20 10:51:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 737 states have (on average 3.7869742198100407) internal successors, (2791), 830 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2791 transitions. [2022-11-20 10:51:21,213 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2791 transitions. Word has length 5 [2022-11-20 10:51:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,213 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 2791 transitions. [2022-11-20 10:51:21,213 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) [2022-11-20 10:51:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2791 transitions. [2022-11-20 10:51:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:51:21,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:51:21,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:21,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:21,426 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash 808943270, now seen corresponding path program 1 times [2022-11-20 10:51:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:21,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753932082] [2022-11-20 10:51:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:21,428 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 [2022-11-20 10:51:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:21,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:21,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:21,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:51:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:21,648 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:51:21,649 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 10:51:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:21,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:21,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:21,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753932082] [2022-11-20 10:51:21,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753932082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:21,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:21,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486412464] [2022-11-20 10:51:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:21,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:21,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:21,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:21,794 INFO L87 Difference]: Start difference. First operand 831 states and 2791 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) [2022-11-20 10:51:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,949 INFO L93 Difference]: Finished difference Result 832 states and 2799 transitions. [2022-11-20 10:51:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:21,949 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 [2022-11-20 10:51:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,955 INFO L225 Difference]: With dead ends: 832 [2022-11-20 10:51:21,955 INFO L226 Difference]: Without dead ends: 832 [2022-11-20 10:51:21,955 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 [2022-11-20 10:51:21,956 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 10:51:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-20 10:51:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 829. [2022-11-20 10:51:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 735 states have (on average 3.797278911564626) internal successors, (2791), 828 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2791 transitions. [2022-11-20 10:51:21,982 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2791 transitions. Word has length 5 [2022-11-20 10:51:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,982 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 2791 transitions. [2022-11-20 10:51:21,983 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) [2022-11-20 10:51:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2791 transitions. [2022-11-20 10:51:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:51:21,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:51:21,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:22,192 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 809875026, now seen corresponding path program 1 times [2022-11-20 10:51:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650994032] [2022-11-20 10:51:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,193 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 [2022-11-20 10:51:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:22,194 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:22,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:51:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:22,369 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:51:22,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:51:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:22,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:22,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:22,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650994032] [2022-11-20 10:51:22,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650994032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:22,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:22,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:51:22,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092521399] [2022-11-20 10:51:22,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:22,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:22,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:22,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:22,407 INFO L87 Difference]: Start difference. First operand 829 states and 2791 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) [2022-11-20 10:51:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:22,603 INFO L93 Difference]: Finished difference Result 507 states and 1671 transitions. [2022-11-20 10:51:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:51:22,603 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 [2022-11-20 10:51:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:22,607 INFO L225 Difference]: With dead ends: 507 [2022-11-20 10:51:22,607 INFO L226 Difference]: Without dead ends: 507 [2022-11-20 10:51:22,607 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 [2022-11-20 10:51:22,608 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:22,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-20 10:51:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2022-11-20 10:51:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 470 states have (on average 3.5553191489361704) internal successors, (1671), 506 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1671 transitions. [2022-11-20 10:51:22,622 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1671 transitions. Word has length 5 [2022-11-20 10:51:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:22,623 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 1671 transitions. [2022-11-20 10:51:22,623 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) [2022-11-20 10:51:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1671 transitions. [2022-11-20 10:51:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:51:22,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:22,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:51:22,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:22,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:22,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash 809875027, now seen corresponding path program 1 times [2022-11-20 10:51:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852429511] [2022-11-20 10:51:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,836 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 [2022-11-20 10:51:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:22,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:51:22,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:23,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:23,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:23,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:23,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852429511] [2022-11-20 10:51:23,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852429511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:23,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:23,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798183778] [2022-11-20 10:51:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:23,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:23,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:23,146 INFO L87 Difference]: Start difference. First operand 507 states and 1671 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-20 10:51:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:23,550 INFO L93 Difference]: Finished difference Result 801 states and 2617 transitions. [2022-11-20 10:51:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:51:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-11-20 10:51:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:23,555 INFO L225 Difference]: With dead ends: 801 [2022-11-20 10:51:23,555 INFO L226 Difference]: Without dead ends: 801 [2022-11-20 10:51:23,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:23,556 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:23,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 7 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-11-20 10:51:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 604. [2022-11-20 10:51:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 567 states have (on average 3.710758377425044) internal successors, (2104), 603 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2104 transitions. [2022-11-20 10:51:23,592 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2104 transitions. Word has length 5 [2022-11-20 10:51:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 2104 transitions. [2022-11-20 10:51:23,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-11-20 10:51:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2104 transitions. [2022-11-20 10:51:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:51:23,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:23,595 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 10:51:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:23,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:23,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash -693530564, now seen corresponding path program 2 times [2022-11-20 10:51:23,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:23,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870836347] [2022-11-20 10:51:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:23,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:23,809 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:23,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:23,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:23,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:51:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:24,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:24,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:25,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870836347] [2022-11-20 10:51:25,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870836347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:25,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:25,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:51:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866919519] [2022-11-20 10:51:25,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:25,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:51:25,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:51:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:51:25,150 INFO L87 Difference]: Start difference. First operand 604 states and 2104 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) [2022-11-20 10:51:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:30,692 INFO L93 Difference]: Finished difference Result 5908 states and 20761 transitions. [2022-11-20 10:51:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:51:30,694 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 [2022-11-20 10:51:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:30,723 INFO L225 Difference]: With dead ends: 5908 [2022-11-20 10:51:30,723 INFO L226 Difference]: Without dead ends: 5908 [2022-11-20 10:51:30,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:51:30,724 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1143 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:30,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 87 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-20 10:51:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2022-11-20 10:51:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 610. [2022-11-20 10:51:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 573 states have (on average 3.6928446771378707) internal successors, (2116), 609 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 2116 transitions. [2022-11-20 10:51:30,809 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 2116 transitions. Word has length 6 [2022-11-20 10:51:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:30,810 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 2116 transitions. [2022-11-20 10:51:30,810 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) [2022-11-20 10:51:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 2116 transitions. [2022-11-20 10:51:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:51:30,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:30,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:51:30,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:31,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -663673314, now seen corresponding path program 1 times [2022-11-20 10:51:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636816483] [2022-11-20 10:51:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:31,023 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 [2022-11-20 10:51:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:31,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:31,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:51:31,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:31,192 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:51:31,193 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 10:51:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:31,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:31,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636816483] [2022-11-20 10:51:31,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636816483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:31,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:31,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685146732] [2022-11-20 10:51:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:31,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:31,356 INFO L87 Difference]: Start difference. First operand 610 states and 2116 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) [2022-11-20 10:51:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:31,470 INFO L93 Difference]: Finished difference Result 614 states and 2123 transitions. [2022-11-20 10:51:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:31,471 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 [2022-11-20 10:51:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:31,474 INFO L225 Difference]: With dead ends: 614 [2022-11-20 10:51:31,474 INFO L226 Difference]: Without dead ends: 614 [2022-11-20 10:51:31,475 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 [2022-11-20 10:51:31,475 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:31,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:51:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-20 10:51:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-11-20 10:51:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 577 states have (on average 3.679376083188908) internal successors, (2123), 613 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2123 transitions. [2022-11-20 10:51:31,493 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2123 transitions. Word has length 6 [2022-11-20 10:51:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:31,493 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 2123 transitions. [2022-11-20 10:51:31,494 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) [2022-11-20 10:51:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2123 transitions. [2022-11-20 10:51:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:51:31,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:31,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:51:31,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-20 10:51:31,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:31,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:31,707 INFO L85 PathProgramCache]: Analyzing trace with hash -663672735, now seen corresponding path program 1 times [2022-11-20 10:51:31,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:31,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073507957] [2022-11-20 10:51:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:31,707 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 [2022-11-20 10:51:31,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:31,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:31,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:51:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:31,967 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:31,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:32,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:32,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073507957] [2022-11-20 10:51:32,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073507957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:32,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:32,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:51:32,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349197912] [2022-11-20 10:51:32,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:32,099 INFO L87 Difference]: Start difference. First operand 614 states and 2123 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2022-11-20 10:51:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:32,360 INFO L93 Difference]: Finished difference Result 614 states and 2122 transitions. [2022-11-20 10:51:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 [2022-11-20 10:51:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:32,363 INFO L225 Difference]: With dead ends: 614 [2022-11-20 10:51:32,363 INFO L226 Difference]: Without dead ends: 614 [2022-11-20 10:51:32,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:32,364 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:32,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-11-20 10:51:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-20 10:51:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-11-20 10:51:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 577 states have (on average 3.6776429809358753) internal successors, (2122), 613 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2122 transitions. [2022-11-20 10:51:32,382 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2122 transitions. Word has length 6 [2022-11-20 10:51:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:32,383 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 2122 transitions. [2022-11-20 10:51:32,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2022-11-20 10:51:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2122 transitions. [2022-11-20 10:51:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:51:32,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:32,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:51:32,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:32,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:32,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:32,598 INFO L85 PathProgramCache]: Analyzing trace with hash -663503363, now seen corresponding path program 1 times [2022-11-20 10:51:32,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:32,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511692708] [2022-11-20 10:51:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:32,600 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 [2022-11-20 10:51:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:32,601 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:32,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:32,809 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:51:32,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 10:51:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:32,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:32,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:32,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511692708] [2022-11-20 10:51:32,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511692708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:32,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:32,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217755372] [2022-11-20 10:51:32,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:32,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:32,846 INFO L87 Difference]: Start difference. First operand 614 states and 2122 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) [2022-11-20 10:51:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:33,020 INFO L93 Difference]: Finished difference Result 584 states and 2032 transitions. [2022-11-20 10:51:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:33,021 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 [2022-11-20 10:51:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:33,023 INFO L225 Difference]: With dead ends: 584 [2022-11-20 10:51:33,023 INFO L226 Difference]: Without dead ends: 584 [2022-11-20 10:51:33,024 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 [2022-11-20 10:51:33,024 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:33,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-20 10:51:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2022-11-20 10:51:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 553 states have (on average 3.674502712477396) internal successors, (2032), 583 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 2032 transitions. [2022-11-20 10:51:33,041 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 2032 transitions. Word has length 6 [2022-11-20 10:51:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:33,042 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 2032 transitions. [2022-11-20 10:51:33,042 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) [2022-11-20 10:51:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 2032 transitions. [2022-11-20 10:51:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:51:33,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:33,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:51:33,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:33,255 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -663503362, now seen corresponding path program 1 times [2022-11-20 10:51:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187019577] [2022-11-20 10:51:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:33,256 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 [2022-11-20 10:51:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:33,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:33,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:51:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:33,468 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:51:33,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:51:33,477 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 [2022-11-20 10:51:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:33,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:33,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:33,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187019577] [2022-11-20 10:51:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187019577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:33,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:33,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:33,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375046128] [2022-11-20 10:51:33,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:33,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:33,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:33,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:33,512 INFO L87 Difference]: Start difference. First operand 584 states and 2032 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) [2022-11-20 10:51:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:33,682 INFO L93 Difference]: Finished difference Result 554 states and 1942 transitions. [2022-11-20 10:51:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:33,683 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 [2022-11-20 10:51:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:33,685 INFO L225 Difference]: With dead ends: 554 [2022-11-20 10:51:33,685 INFO L226 Difference]: Without dead ends: 554 [2022-11-20 10:51:33,685 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 [2022-11-20 10:51:33,686 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:33,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-20 10:51:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2022-11-20 10:51:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 529 states have (on average 3.671077504725898) internal successors, (1942), 553 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1942 transitions. [2022-11-20 10:51:33,702 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1942 transitions. Word has length 6 [2022-11-20 10:51:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:33,703 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 1942 transitions. [2022-11-20 10:51:33,703 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) [2022-11-20 10:51:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1942 transitions. [2022-11-20 10:51:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:51:33,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:33,704 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 10:51:33,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-11-20 10:51:33,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:33,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -24575163, now seen corresponding path program 2 times [2022-11-20 10:51:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372270872] [2022-11-20 10:51:33,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:33,916 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 [2022-11-20 10:51:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:33,917 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:33,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:34,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:51:34,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:34,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:51:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:34,155 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 10:51:34,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 10:51:34,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 10:51:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:51:34,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:34,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372270872] [2022-11-20 10:51:34,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372270872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:34,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:34,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355090627] [2022-11-20 10:51:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:34,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:34,279 INFO L87 Difference]: Start difference. First operand 554 states and 1942 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) [2022-11-20 10:51:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:34,387 INFO L93 Difference]: Finished difference Result 552 states and 1937 transitions. [2022-11-20 10:51:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:34,387 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 [2022-11-20 10:51:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:34,389 INFO L225 Difference]: With dead ends: 552 [2022-11-20 10:51:34,389 INFO L226 Difference]: Without dead ends: 552 [2022-11-20 10:51:34,390 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 [2022-11-20 10:51:34,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:34,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:51:34,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-11-20 10:51:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-11-20 10:51:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 527 states have (on average 3.6755218216318783) internal successors, (1937), 551 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1937 transitions. [2022-11-20 10:51:34,403 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1937 transitions. Word has length 7 [2022-11-20 10:51:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:34,403 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 1937 transitions. [2022-11-20 10:51:34,403 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) [2022-11-20 10:51:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1937 transitions. [2022-11-20 10:51:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:51:34,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:34,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:34,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:51:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:34,616 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash 5250713, now seen corresponding path program 1 times [2022-11-20 10:51:34,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:34,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546261480] [2022-11-20 10:51:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:34,618 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 [2022-11-20 10:51:34,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:34,620 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:34,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:51:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:34,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:34,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:34,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546261480] [2022-11-20 10:51:34,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546261480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:34,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:34,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 10:51:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942810078] [2022-11-20 10:51:34,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:51:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:34,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:51:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:51:34,943 INFO L87 Difference]: Start difference. First operand 552 states and 1937 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2022-11-20 10:51:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:36,134 INFO L93 Difference]: Finished difference Result 1595 states and 5516 transitions. [2022-11-20 10:51:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:51:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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 7 [2022-11-20 10:51:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:36,145 INFO L225 Difference]: With dead ends: 1595 [2022-11-20 10:51:36,145 INFO L226 Difference]: Without dead ends: 1595 [2022-11-20 10:51:36,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:51:36,146 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:36,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 43 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:51:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-11-20 10:51:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 724. [2022-11-20 10:51:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 699 states have (on average 3.6466380543633763) internal successors, (2549), 723 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2549 transitions. [2022-11-20 10:51:36,192 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2549 transitions. Word has length 7 [2022-11-20 10:51:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:36,192 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 2549 transitions. [2022-11-20 10:51:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2022-11-20 10:51:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2549 transitions. [2022-11-20 10:51:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:51:36,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:36,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:36,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:36,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 5251292, now seen corresponding path program 1 times [2022-11-20 10:51:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:36,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535062096] [2022-11-20 10:51:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:36,406 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 [2022-11-20 10:51:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:36,407 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:51:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:36,676 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:36,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:36,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:37,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535062096] [2022-11-20 10:51:37,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535062096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:37,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:37,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:51:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877457583] [2022-11-20 10:51:37,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:37,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:51:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:51:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:51:37,283 INFO L87 Difference]: Start difference. First operand 724 states and 2549 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 10:51:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:38,865 INFO L93 Difference]: Finished difference Result 1344 states and 4708 transitions. [2022-11-20 10:51:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:51:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 [2022-11-20 10:51:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:38,869 INFO L225 Difference]: With dead ends: 1344 [2022-11-20 10:51:38,869 INFO L226 Difference]: Without dead ends: 1344 [2022-11-20 10:51:38,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:51:38,870 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 338 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:38,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 17 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:51:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-11-20 10:51:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 994. [2022-11-20 10:51:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 969 states have (on average 3.8875128998968007) internal successors, (3767), 993 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3767 transitions. [2022-11-20 10:51:38,904 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3767 transitions. Word has length 7 [2022-11-20 10:51:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:38,905 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 3767 transitions. [2022-11-20 10:51:38,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 10:51:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3767 transitions. [2022-11-20 10:51:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:51:38,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:38,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:38,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:51:39,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:39,111 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 5251426, now seen corresponding path program 1 times [2022-11-20 10:51:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:39,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902843077] [2022-11-20 10:51:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:39,112 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 [2022-11-20 10:51:39,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:39,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:39,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:51:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:39,310 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:51:39,310 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 10:51:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:39,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:39,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902843077] [2022-11-20 10:51:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902843077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:39,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372552926] [2022-11-20 10:51:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:39,483 INFO L87 Difference]: Start difference. First operand 994 states and 3767 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) [2022-11-20 10:51:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:39,593 INFO L93 Difference]: Finished difference Result 990 states and 3750 transitions. [2022-11-20 10:51:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:39,594 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 [2022-11-20 10:51:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:39,597 INFO L225 Difference]: With dead ends: 990 [2022-11-20 10:51:39,597 INFO L226 Difference]: Without dead ends: 990 [2022-11-20 10:51:39,597 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 [2022-11-20 10:51:39,603 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:39,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:51:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-20 10:51:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-20 10:51:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 965 states have (on average 3.8860103626943006) internal successors, (3750), 989 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3750 transitions. [2022-11-20 10:51:39,629 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3750 transitions. Word has length 7 [2022-11-20 10:51:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:39,630 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 3750 transitions. [2022-11-20 10:51:39,630 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) [2022-11-20 10:51:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3750 transitions. [2022-11-20 10:51:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:51:39,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:39,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:39,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:39,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:39,839 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 906227397, now seen corresponding path program 1 times [2022-11-20 10:51:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:39,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489015491] [2022-11-20 10:51:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:39,840 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 [2022-11-20 10:51:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:39,840 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:39,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:40,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:40,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:40,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:40,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489015491] [2022-11-20 10:51:40,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489015491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:40,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:40,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:40,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877641312] [2022-11-20 10:51:40,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:40,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:40,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:40,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:40,285 INFO L87 Difference]: Start difference. First operand 990 states and 3750 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:40,458 INFO L93 Difference]: Finished difference Result 994 states and 3767 transitions. [2022-11-20 10:51:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:51:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:40,461 INFO L225 Difference]: With dead ends: 994 [2022-11-20 10:51:40,461 INFO L226 Difference]: Without dead ends: 994 [2022-11-20 10:51:40,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:40,462 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:40,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:51:40,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-11-20 10:51:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2022-11-20 10:51:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 969 states have (on average 3.8875128998968007) internal successors, (3767), 993 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3767 transitions. [2022-11-20 10:51:40,489 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3767 transitions. Word has length 7 [2022-11-20 10:51:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:40,490 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 3767 transitions. [2022-11-20 10:51:40,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3767 transitions. [2022-11-20 10:51:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:51:40,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:40,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:40,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:40,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:40,703 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 162794677, now seen corresponding path program 1 times [2022-11-20 10:51:40,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:40,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189959724] [2022-11-20 10:51:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:40,703 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 [2022-11-20 10:51:40,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:40,704 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:40,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:51:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:40,906 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 10:51:40,906 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 10:51:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:40,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:40,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189959724] [2022-11-20 10:51:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189959724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:40,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:40,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:51:40,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275945006] [2022-11-20 10:51:40,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:40,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:40,957 INFO L87 Difference]: Start difference. First operand 994 states and 3767 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) [2022-11-20 10:51:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:41,111 INFO L93 Difference]: Finished difference Result 967 states and 3688 transitions. [2022-11-20 10:51:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:41,111 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 [2022-11-20 10:51:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:41,114 INFO L225 Difference]: With dead ends: 967 [2022-11-20 10:51:41,114 INFO L226 Difference]: Without dead ends: 967 [2022-11-20 10:51:41,114 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 [2022-11-20 10:51:41,115 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:41,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-20 10:51:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 966. [2022-11-20 10:51:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 947 states have (on average 3.893347412882788) internal successors, (3687), 965 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3687 transitions. [2022-11-20 10:51:41,142 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3687 transitions. Word has length 8 [2022-11-20 10:51:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:41,142 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 3687 transitions. [2022-11-20 10:51:41,142 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) [2022-11-20 10:51:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3687 transitions. [2022-11-20 10:51:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:51:41,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:41,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:41,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:41,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:41,355 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1971718876, now seen corresponding path program 1 times [2022-11-20 10:51:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:41,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300941811] [2022-11-20 10:51:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:41,356 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 [2022-11-20 10:51:41,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:41,357 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:41,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:41,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:41,624 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:41,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:41,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:41,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300941811] [2022-11-20 10:51:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300941811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:41,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:41,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938662964] [2022-11-20 10:51:41,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:41,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:41,846 INFO L87 Difference]: Start difference. First operand 966 states and 3687 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:42,035 INFO L93 Difference]: Finished difference Result 970 states and 3704 transitions. [2022-11-20 10:51:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:51:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:42,039 INFO L225 Difference]: With dead ends: 970 [2022-11-20 10:51:42,039 INFO L226 Difference]: Without dead ends: 970 [2022-11-20 10:51:42,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:42,040 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:42,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:51:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-11-20 10:51:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 970. [2022-11-20 10:51:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 951 states have (on average 3.8948475289169298) internal successors, (3704), 969 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 3704 transitions. [2022-11-20 10:51:42,067 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 3704 transitions. Word has length 8 [2022-11-20 10:51:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 3704 transitions. [2022-11-20 10:51:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 3704 transitions. [2022-11-20 10:51:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:51:42,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:42,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:42,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:42,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:42,280 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1971552420, now seen corresponding path program 1 times [2022-11-20 10:51:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376024947] [2022-11-20 10:51:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:42,280 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 [2022-11-20 10:51:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:42,283 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:42,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:51:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:42,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:42,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376024947] [2022-11-20 10:51:42,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376024947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:42,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:42,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:51:42,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917352696] [2022-11-20 10:51:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:42,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:42,419 INFO L87 Difference]: Start difference. First operand 970 states and 3704 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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) [2022-11-20 10:51:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:42,576 INFO L93 Difference]: Finished difference Result 720 states and 2604 transitions. [2022-11-20 10:51:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-11-20 10:51:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:42,579 INFO L225 Difference]: With dead ends: 720 [2022-11-20 10:51:42,579 INFO L226 Difference]: Without dead ends: 720 [2022-11-20 10:51:42,580 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 [2022-11-20 10:51:42,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:42,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-20 10:51:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-11-20 10:51:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 709 states have (on average 3.67277856135402) internal successors, (2604), 719 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2604 transitions. [2022-11-20 10:51:42,601 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2604 transitions. Word has length 8 [2022-11-20 10:51:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:42,601 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 2604 transitions. [2022-11-20 10:51:42,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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) [2022-11-20 10:51:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2604 transitions. [2022-11-20 10:51:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:51:42,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:42,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:42,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:42,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:42,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1971553336, now seen corresponding path program 2 times [2022-11-20 10:51:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:42,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91989296] [2022-11-20 10:51:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:42,815 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 [2022-11-20 10:51:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:42,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:42,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:51:42,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:42,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:43,086 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:43,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:43,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:43,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:43,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91989296] [2022-11-20 10:51:43,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91989296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:43,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:43,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:43,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950419443] [2022-11-20 10:51:43,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:43,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:43,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:43,288 INFO L87 Difference]: Start difference. First operand 720 states and 2604 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:43,443 INFO L93 Difference]: Finished difference Result 724 states and 2621 transitions. [2022-11-20 10:51:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:51:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:43,446 INFO L225 Difference]: With dead ends: 724 [2022-11-20 10:51:43,446 INFO L226 Difference]: Without dead ends: 724 [2022-11-20 10:51:43,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:43,447 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:43,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:51:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-20 10:51:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 720. [2022-11-20 10:51:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 709 states have (on average 3.67277856135402) internal successors, (2604), 719 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2604 transitions. [2022-11-20 10:51:43,467 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2604 transitions. Word has length 8 [2022-11-20 10:51:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:43,468 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 2604 transitions. [2022-11-20 10:51:43,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2604 transitions. [2022-11-20 10:51:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:43,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:43,469 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:43,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:43,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:43,680 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:43,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2142044671, now seen corresponding path program 1 times [2022-11-20 10:51:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988654881] [2022-11-20 10:51:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:43,681 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 [2022-11-20 10:51:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:43,682 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:43,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:43,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:51:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:43,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:43,990 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 10:51:43,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 10:51:44,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:51:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:44,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:45,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:45,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988654881] [2022-11-20 10:51:45,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988654881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:45,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:45,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:51:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159232062] [2022-11-20 10:51:45,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:51:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:45,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:51:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:51:45,240 INFO L87 Difference]: Start difference. First operand 720 states and 2604 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2022-11-20 10:51:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:46,124 INFO L93 Difference]: Finished difference Result 736 states and 2642 transitions. [2022-11-20 10:51:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:51:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 [2022-11-20 10:51:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:46,127 INFO L225 Difference]: With dead ends: 736 [2022-11-20 10:51:46,127 INFO L226 Difference]: Without dead ends: 736 [2022-11-20 10:51:46,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:51:46,128 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:46,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 27 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-11-20 10:51:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-20 10:51:46,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 720. [2022-11-20 10:51:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 709 states have (on average 3.67277856135402) internal successors, (2604), 719 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2604 transitions. [2022-11-20 10:51:46,154 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2604 transitions. Word has length 9 [2022-11-20 10:51:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:46,154 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 2604 transitions. [2022-11-20 10:51:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2022-11-20 10:51:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2604 transitions. [2022-11-20 10:51:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:46,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:46,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:46,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:46,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:46,363 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:46,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1756656846, now seen corresponding path program 1 times [2022-11-20 10:51:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:46,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573865009] [2022-11-20 10:51:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:46,363 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 [2022-11-20 10:51:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:46,364 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:46,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:46,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:46,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:46,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:46,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:46,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573865009] [2022-11-20 10:51:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573865009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:46,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:46,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:46,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147707262] [2022-11-20 10:51:46,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:46,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:46,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:46,830 INFO L87 Difference]: Start difference. First operand 720 states and 2604 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:46,993 INFO L93 Difference]: Finished difference Result 725 states and 2615 transitions. [2022-11-20 10:51:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:46,996 INFO L225 Difference]: With dead ends: 725 [2022-11-20 10:51:46,996 INFO L226 Difference]: Without dead ends: 725 [2022-11-20 10:51:46,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:46,997 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:51:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-20 10:51:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 724. [2022-11-20 10:51:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 713 states have (on average 3.661991584852735) internal successors, (2611), 723 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2611 transitions. [2022-11-20 10:51:47,028 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2611 transitions. Word has length 9 [2022-11-20 10:51:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:47,028 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 2611 transitions. [2022-11-20 10:51:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2611 transitions. [2022-11-20 10:51:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:47,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:47,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:47,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:51:47,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:47,230 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:47,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1753374876, now seen corresponding path program 2 times [2022-11-20 10:51:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:47,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48431043] [2022-11-20 10:51:47,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:47,231 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 [2022-11-20 10:51:47,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:47,232 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:47,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:47,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:51:47,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:47,485 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:47,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:47,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:47,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48431043] [2022-11-20 10:51:47,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48431043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:47,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:47,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418374131] [2022-11-20 10:51:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:47,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:47,715 INFO L87 Difference]: Start difference. First operand 724 states and 2611 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:47,895 INFO L93 Difference]: Finished difference Result 725 states and 2614 transitions. [2022-11-20 10:51:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:47,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:47,898 INFO L225 Difference]: With dead ends: 725 [2022-11-20 10:51:47,898 INFO L226 Difference]: Without dead ends: 725 [2022-11-20 10:51:47,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:47,899 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:47,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:51:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-20 10:51:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 724. [2022-11-20 10:51:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 713 states have (on average 3.661991584852735) internal successors, (2611), 723 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2611 transitions. [2022-11-20 10:51:47,940 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2611 transitions. Word has length 9 [2022-11-20 10:51:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 2611 transitions. [2022-11-20 10:51:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2611 transitions. [2022-11-20 10:51:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:47,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:47,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:47,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:48,154 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1753374163, now seen corresponding path program 1 times [2022-11-20 10:51:48,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:48,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356834107] [2022-11-20 10:51:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:48,155 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 [2022-11-20 10:51:48,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:48,156 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:48,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:51:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:48,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:48,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:48,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356834107] [2022-11-20 10:51:48,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356834107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:48,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:48,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:51:48,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213966716] [2022-11-20 10:51:48,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:48,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:51:48,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:51:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:48,366 INFO L87 Difference]: Start difference. First operand 724 states and 2611 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:49,060 INFO L93 Difference]: Finished difference Result 1470 states and 5012 transitions. [2022-11-20 10:51:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:49,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-11-20 10:51:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:49,064 INFO L225 Difference]: With dead ends: 1470 [2022-11-20 10:51:49,064 INFO L226 Difference]: Without dead ends: 1470 [2022-11-20 10:51:49,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:51:49,065 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 144 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:49,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 16 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:51:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-11-20 10:51:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 873. [2022-11-20 10:51:49,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 3.8723897911832945) internal successors, (3338), 872 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3338 transitions. [2022-11-20 10:51:49,121 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3338 transitions. Word has length 9 [2022-11-20 10:51:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:49,121 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 3338 transitions. [2022-11-20 10:51:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:49,122 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3338 transitions. [2022-11-20 10:51:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:49,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:49,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:49,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:49,323 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1753203973, now seen corresponding path program 2 times [2022-11-20 10:51:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:49,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101672074] [2022-11-20 10:51:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:49,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:49,325 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:49,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:49,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:51:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:49,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:51:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:49,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:49,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101672074] [2022-11-20 10:51:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101672074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:49,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:49,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:51:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992740310] [2022-11-20 10:51:49,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:49,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:51:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:51:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:49,557 INFO L87 Difference]: Start difference. First operand 873 states and 3338 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:50,434 INFO L93 Difference]: Finished difference Result 1715 states and 6283 transitions. [2022-11-20 10:51:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:51:50,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-11-20 10:51:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:50,439 INFO L225 Difference]: With dead ends: 1715 [2022-11-20 10:51:50,440 INFO L226 Difference]: Without dead ends: 1715 [2022-11-20 10:51:50,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:51:50,440 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:50,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 28 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:51:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-20 10:51:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 909. [2022-11-20 10:51:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 898 states have (on average 3.8530066815144766) internal successors, (3460), 908 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3460 transitions. [2022-11-20 10:51:50,478 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3460 transitions. Word has length 9 [2022-11-20 10:51:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:50,479 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 3460 transitions. [2022-11-20 10:51:50,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3460 transitions. [2022-11-20 10:51:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:50,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:50,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:50,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:50,691 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash -993744742, now seen corresponding path program 1 times [2022-11-20 10:51:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:50,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256285841] [2022-11-20 10:51:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:50,692 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 [2022-11-20 10:51:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:50,693 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:50,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:50,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:50,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:51,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:51,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256285841] [2022-11-20 10:51:51,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256285841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:51,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:51,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:51,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694682527] [2022-11-20 10:51:51,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:51,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:51,152 INFO L87 Difference]: Start difference. First operand 909 states and 3460 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:51,328 INFO L93 Difference]: Finished difference Result 987 states and 3836 transitions. [2022-11-20 10:51:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:51,331 INFO L225 Difference]: With dead ends: 987 [2022-11-20 10:51:51,331 INFO L226 Difference]: Without dead ends: 987 [2022-11-20 10:51:51,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:51,332 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:51,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-20 10:51:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-11-20 10:51:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 965. [2022-11-20 10:51:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 954 states have (on average 3.908805031446541) internal successors, (3729), 964 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3729 transitions. [2022-11-20 10:51:51,349 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3729 transitions. Word has length 9 [2022-11-20 10:51:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:51,349 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 3729 transitions. [2022-11-20 10:51:51,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3729 transitions. [2022-11-20 10:51:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:51,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:51,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:51,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:51,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:51,562 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:51,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:51,563 INFO L85 PathProgramCache]: Analyzing trace with hash -993923519, now seen corresponding path program 3 times [2022-11-20 10:51:51,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:51,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551077743] [2022-11-20 10:51:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:51,563 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 [2022-11-20 10:51:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:51,564 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:51,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:51,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:51:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:51:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:51,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:51,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551077743] [2022-11-20 10:51:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551077743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:51,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:51,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:51:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932995730] [2022-11-20 10:51:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:51:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:51:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:51,782 INFO L87 Difference]: Start difference. First operand 965 states and 3729 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:52,416 INFO L93 Difference]: Finished difference Result 2114 states and 7711 transitions. [2022-11-20 10:51:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:51:52,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-11-20 10:51:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:52,422 INFO L225 Difference]: With dead ends: 2114 [2022-11-20 10:51:52,422 INFO L226 Difference]: Without dead ends: 2114 [2022-11-20 10:51:52,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:51:52,423 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 123 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:52,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 16 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:51:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-11-20 10:51:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 944. [2022-11-20 10:51:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 933 states have (on average 3.9035369774919615) internal successors, (3642), 943 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3642 transitions. [2022-11-20 10:51:52,446 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3642 transitions. Word has length 9 [2022-11-20 10:51:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:52,447 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 3642 transitions. [2022-11-20 10:51:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-11-20 10:51:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3642 transitions. [2022-11-20 10:51:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:52,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:52,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:52,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:52,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:52,648 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash -993810276, now seen corresponding path program 1 times [2022-11-20 10:51:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217851111] [2022-11-20 10:51:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:52,649 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 [2022-11-20 10:51:52,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:52,651 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:52,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:51:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:52,934 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:52,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:53,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:53,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217851111] [2022-11-20 10:51:53,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217851111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:53,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:53,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:51:53,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502257182] [2022-11-20 10:51:53,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:53,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:53,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:53,113 INFO L87 Difference]: Start difference. First operand 944 states and 3642 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:53,330 INFO L93 Difference]: Finished difference Result 938 states and 3617 transitions. [2022-11-20 10:51:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:53,333 INFO L225 Difference]: With dead ends: 938 [2022-11-20 10:51:53,334 INFO L226 Difference]: Without dead ends: 938 [2022-11-20 10:51:53,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:53,334 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:53,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 10:51:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-20 10:51:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2022-11-20 10:51:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 927 states have (on average 3.901833872707659) internal successors, (3617), 937 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3617 transitions. [2022-11-20 10:51:53,353 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3617 transitions. Word has length 9 [2022-11-20 10:51:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:53,353 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 3617 transitions. [2022-11-20 10:51:53,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3617 transitions. [2022-11-20 10:51:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:53,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:53,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:53,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:53,567 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:53,567 INFO L85 PathProgramCache]: Analyzing trace with hash -988585633, now seen corresponding path program 1 times [2022-11-20 10:51:53,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:53,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914539531] [2022-11-20 10:51:53,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:53,567 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 [2022-11-20 10:51:53,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:53,569 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:53,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:51:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:53,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:53,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914539531] [2022-11-20 10:51:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914539531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:53,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:53,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445191955] [2022-11-20 10:51:53,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:53,830 INFO L87 Difference]: Start difference. First operand 938 states and 3617 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:54,434 INFO L93 Difference]: Finished difference Result 1196 states and 4455 transitions. [2022-11-20 10:51:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:51:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:54,437 INFO L225 Difference]: With dead ends: 1196 [2022-11-20 10:51:54,438 INFO L226 Difference]: Without dead ends: 1196 [2022-11-20 10:51:54,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:51:54,438 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 11 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:51:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-20 10:51:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1099. [2022-11-20 10:51:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1088 states have (on average 3.8189338235294117) internal successors, (4155), 1098 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 4155 transitions. [2022-11-20 10:51:54,463 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 4155 transitions. Word has length 9 [2022-11-20 10:51:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:54,463 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 4155 transitions. [2022-11-20 10:51:54,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 4155 transitions. [2022-11-20 10:51:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:54,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:54,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:54,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-20 10:51:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:54,664 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -988586032, now seen corresponding path program 2 times [2022-11-20 10:51:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:54,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584224631] [2022-11-20 10:51:54,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:54,665 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 [2022-11-20 10:51:54,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:54,666 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:54,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:54,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:51:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:54,932 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:54,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:55,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:55,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584224631] [2022-11-20 10:51:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584224631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:55,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:55,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919839729] [2022-11-20 10:51:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:55,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:55,186 INFO L87 Difference]: Start difference. First operand 1099 states and 4155 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:55,354 INFO L93 Difference]: Finished difference Result 1103 states and 4176 transitions. [2022-11-20 10:51:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:55,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:55,359 INFO L225 Difference]: With dead ends: 1103 [2022-11-20 10:51:55,359 INFO L226 Difference]: Without dead ends: 1103 [2022-11-20 10:51:55,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:55,360 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:55,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 10:51:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-20 10:51:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1103. [2022-11-20 10:51:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1092 states have (on average 3.8241758241758244) internal successors, (4176), 1102 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 4176 transitions. [2022-11-20 10:51:55,390 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 4176 transitions. Word has length 9 [2022-11-20 10:51:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:55,390 INFO L495 AbstractCegarLoop]: Abstraction has 1103 states and 4176 transitions. [2022-11-20 10:51:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 4176 transitions. [2022-11-20 10:51:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:51:55,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:55,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:55,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:55,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:55,603 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -988613002, now seen corresponding path program 3 times [2022-11-20 10:51:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:55,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379536050] [2022-11-20 10:51:55,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:55,604 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 [2022-11-20 10:51:55,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:55,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:55,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:55,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:51:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:51:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:55,871 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:55,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:56,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:51:56,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379536050] [2022-11-20 10:51:56,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379536050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:56,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:56,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571909284] [2022-11-20 10:51:56,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:51:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:51:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:56,129 INFO L87 Difference]: Start difference. First operand 1103 states and 4176 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:56,314 INFO L93 Difference]: Finished difference Result 1103 states and 4172 transitions. [2022-11-20 10:51:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:51:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:56,318 INFO L225 Difference]: With dead ends: 1103 [2022-11-20 10:51:56,319 INFO L226 Difference]: Without dead ends: 1103 [2022-11-20 10:51:56,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:51:56,319 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:56,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:51:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-20 10:51:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1099. [2022-11-20 10:51:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1088 states have (on average 3.8152573529411766) internal successors, (4151), 1098 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 4151 transitions. [2022-11-20 10:51:56,346 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 4151 transitions. Word has length 9 [2022-11-20 10:51:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:56,346 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 4151 transitions. [2022-11-20 10:51:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 4151 transitions. [2022-11-20 10:51:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:51:56,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:56,349 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:56,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:56,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:51:56,561 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:51:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1827584888, now seen corresponding path program 2 times [2022-11-20 10:51:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:51:56,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068579558] [2022-11-20 10:51:56,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:56,562 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 [2022-11-20 10:51:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:51:56,563 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:51:56,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:51:56,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:51:56,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:56,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:51:56,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:51:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:57,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:58,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:51:58,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068579558] [2022-11-20 10:51:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068579558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:58,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:51:58,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:51:58,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775954399] [2022-11-20 10:51:58,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:58,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:51:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:51:58,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:51:58,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:51:58,477 INFO L87 Difference]: Start difference. First operand 1099 states and 4151 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2022-11-20 10:52:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:08,134 INFO L93 Difference]: Finished difference Result 3552 states and 12499 transitions. [2022-11-20 10:52:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:52:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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 [2022-11-20 10:52:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:08,144 INFO L225 Difference]: With dead ends: 3552 [2022-11-20 10:52:08,144 INFO L226 Difference]: Without dead ends: 3552 [2022-11-20 10:52:08,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:52:08,144 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:08,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 158 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 999 Invalid, 0 Unknown, 604 Unchecked, 6.3s Time] [2022-11-20 10:52:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2022-11-20 10:52:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 1329. [2022-11-20 10:52:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 1318 states have (on average 3.8763277693474962) internal successors, (5109), 1328 states have internal predecessors, (5109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 5109 transitions. [2022-11-20 10:52:08,179 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 5109 transitions. Word has length 10 [2022-11-20 10:52:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:08,179 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 5109 transitions. [2022-11-20 10:52:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 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) [2022-11-20 10:52:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 5109 transitions. [2022-11-20 10:52:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:08,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:08,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:08,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:08,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:08,393 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:08,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1726375359, now seen corresponding path program 1 times [2022-11-20 10:52:08,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402547310] [2022-11-20 10:52:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:08,394 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 [2022-11-20 10:52:08,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:08,395 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:08,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:52:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:08,675 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:08,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:08,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:09,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:09,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402547310] [2022-11-20 10:52:09,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402547310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:09,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:09,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:52:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487006138] [2022-11-20 10:52:09,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:52:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:52:09,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:52:09,647 INFO L87 Difference]: Start difference. First operand 1329 states and 5109 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2022-11-20 10:52:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:10,209 INFO L93 Difference]: Finished difference Result 1341 states and 5151 transitions. [2022-11-20 10:52:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:52:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 [2022-11-20 10:52:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:10,214 INFO L225 Difference]: With dead ends: 1341 [2022-11-20 10:52:10,214 INFO L226 Difference]: Without dead ends: 1341 [2022-11-20 10:52:10,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:52:10,215 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:10,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 12 Unchecked, 0.5s Time] [2022-11-20 10:52:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-11-20 10:52:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1341. [2022-11-20 10:52:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1330 states have (on average 3.8729323308270676) internal successors, (5151), 1340 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 5151 transitions. [2022-11-20 10:52:10,239 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 5151 transitions. Word has length 10 [2022-11-20 10:52:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:10,240 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 5151 transitions. [2022-11-20 10:52:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2022-11-20 10:52:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 5151 transitions. [2022-11-20 10:52:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:10,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:10,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:10,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:10,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:10,443 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1721150716, now seen corresponding path program 1 times [2022-11-20 10:52:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:10,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596149202] [2022-11-20 10:52:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:10,444 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 [2022-11-20 10:52:10,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:10,444 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:10,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:52:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:10,743 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:10,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:11,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:11,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596149202] [2022-11-20 10:52:11,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596149202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:11,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:11,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:52:11,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741310639] [2022-11-20 10:52:11,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:11,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:52:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:11,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:52:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:52:11,848 INFO L87 Difference]: Start difference. First operand 1341 states and 5151 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) [2022-11-20 10:52:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:15,789 INFO L93 Difference]: Finished difference Result 3415 states and 13459 transitions. [2022-11-20 10:52:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:52:15,791 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 [2022-11-20 10:52:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:15,800 INFO L225 Difference]: With dead ends: 3415 [2022-11-20 10:52:15,800 INFO L226 Difference]: Without dead ends: 3415 [2022-11-20 10:52:15,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:52:15,801 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 302 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:15,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 47 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 354 Invalid, 0 Unknown, 131 Unchecked, 1.9s Time] [2022-11-20 10:52:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2022-11-20 10:52:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 2233. [2022-11-20 10:52:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2222 states have (on average 3.9617461746174616) internal successors, (8803), 2232 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8803 transitions. [2022-11-20 10:52:15,882 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8803 transitions. Word has length 10 [2022-11-20 10:52:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:15,882 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 8803 transitions. [2022-11-20 10:52:15,882 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) [2022-11-20 10:52:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8803 transitions. [2022-11-20 10:52:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:15,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:15,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:15,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:16,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:16,096 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1378215511, now seen corresponding path program 1 times [2022-11-20 10:52:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:16,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033548719] [2022-11-20 10:52:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:16,097 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 [2022-11-20 10:52:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:16,098 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:16,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:16,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:16,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:16,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:16,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033548719] [2022-11-20 10:52:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033548719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:16,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:16,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001749288] [2022-11-20 10:52:16,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:16,609 INFO L87 Difference]: Start difference. First operand 2233 states and 8803 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:16,807 INFO L93 Difference]: Finished difference Result 2286 states and 9030 transitions. [2022-11-20 10:52:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:16,814 INFO L225 Difference]: With dead ends: 2286 [2022-11-20 10:52:16,814 INFO L226 Difference]: Without dead ends: 2286 [2022-11-20 10:52:16,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:16,815 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:16,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-20 10:52:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-11-20 10:52:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2233. [2022-11-20 10:52:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2222 states have (on average 3.9617461746174616) internal successors, (8803), 2232 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8803 transitions. [2022-11-20 10:52:16,873 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8803 transitions. Word has length 10 [2022-11-20 10:52:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:16,873 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 8803 transitions. [2022-11-20 10:52:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8803 transitions. [2022-11-20 10:52:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:16,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:16,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:17,087 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1378381051, now seen corresponding path program 2 times [2022-11-20 10:52:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558919410] [2022-11-20 10:52:17,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:17,088 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 [2022-11-20 10:52:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:17,089 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:17,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:17,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:52:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:17,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:17,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:17,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:17,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:17,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558919410] [2022-11-20 10:52:17,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558919410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:17,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:17,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816241704] [2022-11-20 10:52:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:17,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:17,584 INFO L87 Difference]: Start difference. First operand 2233 states and 8803 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:17,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:17,743 INFO L93 Difference]: Finished difference Result 2237 states and 8816 transitions. [2022-11-20 10:52:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:17,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:17,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:17,750 INFO L225 Difference]: With dead ends: 2237 [2022-11-20 10:52:17,750 INFO L226 Difference]: Without dead ends: 2237 [2022-11-20 10:52:17,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:17,751 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:17,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:52:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2022-11-20 10:52:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2234. [2022-11-20 10:52:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2223 states have (on average 3.9613135402609085) internal successors, (8806), 2233 states have internal predecessors, (8806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8806 transitions. [2022-11-20 10:52:17,788 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8806 transitions. Word has length 10 [2022-11-20 10:52:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:17,788 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 8806 transitions. [2022-11-20 10:52:17,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8806 transitions. [2022-11-20 10:52:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:17,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:17,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:17,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:17,990 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1479956581, now seen corresponding path program 3 times [2022-11-20 10:52:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884801157] [2022-11-20 10:52:17,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:17,991 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 [2022-11-20 10:52:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:17,992 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:18,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:52:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:18,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:18,262 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:18,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:18,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:18,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884801157] [2022-11-20 10:52:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884801157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:18,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57145791] [2022-11-20 10:52:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:18,481 INFO L87 Difference]: Start difference. First operand 2234 states and 8806 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:18,677 INFO L93 Difference]: Finished difference Result 2235 states and 8809 transitions. [2022-11-20 10:52:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:18,685 INFO L225 Difference]: With dead ends: 2235 [2022-11-20 10:52:18,686 INFO L226 Difference]: Without dead ends: 2235 [2022-11-20 10:52:18,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:18,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:18,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:52:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-20 10:52:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2234. [2022-11-20 10:52:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2223 states have (on average 3.9613135402609085) internal successors, (8806), 2233 states have internal predecessors, (8806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8806 transitions. [2022-11-20 10:52:18,761 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8806 transitions. Word has length 10 [2022-11-20 10:52:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:18,762 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 8806 transitions. [2022-11-20 10:52:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8806 transitions. [2022-11-20 10:52:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:18,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:18,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:18,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:18,975 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1485105061, now seen corresponding path program 4 times [2022-11-20 10:52:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012249285] [2022-11-20 10:52:18,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:52:18,976 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 [2022-11-20 10:52:18,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:18,977 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:18,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:19,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:52:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:19,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:19,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:19,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:19,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012249285] [2022-11-20 10:52:19,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012249285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:19,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:19,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308617786] [2022-11-20 10:52:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:19,465 INFO L87 Difference]: Start difference. First operand 2234 states and 8806 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:19,669 INFO L93 Difference]: Finished difference Result 2236 states and 8812 transitions. [2022-11-20 10:52:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:19,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:19,675 INFO L225 Difference]: With dead ends: 2236 [2022-11-20 10:52:19,675 INFO L226 Difference]: Without dead ends: 2236 [2022-11-20 10:52:19,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:19,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:19,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:52:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-11-20 10:52:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2234. [2022-11-20 10:52:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2223 states have (on average 3.9613135402609085) internal successors, (8806), 2233 states have internal predecessors, (8806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8806 transitions. [2022-11-20 10:52:19,714 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8806 transitions. Word has length 10 [2022-11-20 10:52:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:19,714 INFO L495 AbstractCegarLoop]: Abstraction has 2234 states and 8806 transitions. [2022-11-20 10:52:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:19,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8806 transitions. [2022-11-20 10:52:19,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:19,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:19,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:19,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:19,916 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -741240005, now seen corresponding path program 1 times [2022-11-20 10:52:19,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294437518] [2022-11-20 10:52:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:19,917 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 [2022-11-20 10:52:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:19,918 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:19,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:52:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:20,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:20,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:20,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:20,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294437518] [2022-11-20 10:52:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294437518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:20,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:20,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:52:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482761101] [2022-11-20 10:52:20,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:20,366 INFO L87 Difference]: Start difference. First operand 2234 states and 8806 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:20,599 INFO L93 Difference]: Finished difference Result 2254 states and 8864 transitions. [2022-11-20 10:52:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:20,608 INFO L225 Difference]: With dead ends: 2254 [2022-11-20 10:52:20,608 INFO L226 Difference]: Without dead ends: 2254 [2022-11-20 10:52:20,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:20,609 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:20,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 14 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-20 10:52:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2022-11-20 10:52:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2254. [2022-11-20 10:52:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2243 states have (on average 3.9518502006241643) internal successors, (8864), 2253 states have internal predecessors, (8864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 8864 transitions. [2022-11-20 10:52:20,700 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 8864 transitions. Word has length 10 [2022-11-20 10:52:20,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:20,700 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 8864 transitions. [2022-11-20 10:52:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 8864 transitions. [2022-11-20 10:52:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:20,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:20,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:20,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:20,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:20,914 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash -581386056, now seen corresponding path program 1 times [2022-11-20 10:52:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:20,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332470586] [2022-11-20 10:52:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:20,915 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 [2022-11-20 10:52:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:20,916 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:20,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:21,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:21,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:21,182 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:21,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:21,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:21,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:21,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332470586] [2022-11-20 10:52:21,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332470586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:21,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540410027] [2022-11-20 10:52:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:21,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:21,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:21,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:21,433 INFO L87 Difference]: Start difference. First operand 2254 states and 8864 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:21,628 INFO L93 Difference]: Finished difference Result 2281 states and 9022 transitions. [2022-11-20 10:52:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:21,634 INFO L225 Difference]: With dead ends: 2281 [2022-11-20 10:52:21,634 INFO L226 Difference]: Without dead ends: 2281 [2022-11-20 10:52:21,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:21,635 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:21,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:52:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-11-20 10:52:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 2265. [2022-11-20 10:52:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2254 states have (on average 3.9627329192546585) internal successors, (8932), 2264 states have internal predecessors, (8932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 8932 transitions. [2022-11-20 10:52:21,688 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 8932 transitions. Word has length 10 [2022-11-20 10:52:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:21,688 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 8932 transitions. [2022-11-20 10:52:21,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 8932 transitions. [2022-11-20 10:52:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:21,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:21,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:21,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:21,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:21,902 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash -581277463, now seen corresponding path program 1 times [2022-11-20 10:52:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:21,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715297321] [2022-11-20 10:52:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:21,903 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 [2022-11-20 10:52:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:21,906 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:21,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:22,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:22,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:22,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:22,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715297321] [2022-11-20 10:52:22,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715297321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:22,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:22,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32723093] [2022-11-20 10:52:22,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:22,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:22,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:22,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:22,422 INFO L87 Difference]: Start difference. First operand 2265 states and 8932 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:22,640 INFO L93 Difference]: Finished difference Result 2287 states and 9035 transitions. [2022-11-20 10:52:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:22,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:22,648 INFO L225 Difference]: With dead ends: 2287 [2022-11-20 10:52:22,648 INFO L226 Difference]: Without dead ends: 2287 [2022-11-20 10:52:22,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:22,648 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:22,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 10:52:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-20 10:52:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2276. [2022-11-20 10:52:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2265 states have (on average 3.963796909492274) internal successors, (8978), 2275 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 8978 transitions. [2022-11-20 10:52:22,704 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 8978 transitions. Word has length 10 [2022-11-20 10:52:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:22,704 INFO L495 AbstractCegarLoop]: Abstraction has 2276 states and 8978 transitions. [2022-11-20 10:52:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 8978 transitions. [2022-11-20 10:52:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:22,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:22,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:22,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:22,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:22,918 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash -581398146, now seen corresponding path program 2 times [2022-11-20 10:52:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:22,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372282111] [2022-11-20 10:52:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:22,918 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 [2022-11-20 10:52:22,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:22,919 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:22,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:23,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:52:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:23,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:23,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:23,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:23,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:23,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372282111] [2022-11-20 10:52:23,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372282111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:23,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:23,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:23,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604927648] [2022-11-20 10:52:23,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:23,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:23,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:23,417 INFO L87 Difference]: Start difference. First operand 2276 states and 8978 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:23,609 INFO L93 Difference]: Finished difference Result 2298 states and 9103 transitions. [2022-11-20 10:52:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:23,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:23,618 INFO L225 Difference]: With dead ends: 2298 [2022-11-20 10:52:23,618 INFO L226 Difference]: Without dead ends: 2298 [2022-11-20 10:52:23,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:23,619 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:23,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:52:23,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-11-20 10:52:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2287. [2022-11-20 10:52:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2276 states have (on average 3.969683655536028) internal successors, (9035), 2286 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 9035 transitions. [2022-11-20 10:52:23,702 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 9035 transitions. Word has length 10 [2022-11-20 10:52:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:23,702 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 9035 transitions. [2022-11-20 10:52:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 9035 transitions. [2022-11-20 10:52:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:23,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:23,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:23,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:23,916 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash -581394643, now seen corresponding path program 2 times [2022-11-20 10:52:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376416364] [2022-11-20 10:52:23,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:23,917 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 [2022-11-20 10:52:23,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:23,919 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:23,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:24,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:52:24,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:24,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:24,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:24,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:24,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:24,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376416364] [2022-11-20 10:52:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376416364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:24,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349770808] [2022-11-20 10:52:24,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:24,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:24,431 INFO L87 Difference]: Start difference. First operand 2287 states and 9035 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:24,624 INFO L93 Difference]: Finished difference Result 2298 states and 9081 transitions. [2022-11-20 10:52:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:24,631 INFO L225 Difference]: With dead ends: 2298 [2022-11-20 10:52:24,631 INFO L226 Difference]: Without dead ends: 2298 [2022-11-20 10:52:24,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:24,632 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:24,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:52:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2022-11-20 10:52:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2287. [2022-11-20 10:52:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2276 states have (on average 3.969683655536028) internal successors, (9035), 2286 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 9035 transitions. [2022-11-20 10:52:24,676 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 9035 transitions. Word has length 10 [2022-11-20 10:52:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:24,676 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 9035 transitions. [2022-11-20 10:52:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 9035 transitions. [2022-11-20 10:52:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:24,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:24,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:24,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:24,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:24,878 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -582234216, now seen corresponding path program 3 times [2022-11-20 10:52:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:24,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013183272] [2022-11-20 10:52:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:24,879 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 [2022-11-20 10:52:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:24,880 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:24,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:25,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:52:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:25,203 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:25,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:25,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:25,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:25,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013183272] [2022-11-20 10:52:25,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013183272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:25,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:25,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081131160] [2022-11-20 10:52:25,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:25,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:25,457 INFO L87 Difference]: Start difference. First operand 2287 states and 9035 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:25,642 INFO L93 Difference]: Finished difference Result 2287 states and 9024 transitions. [2022-11-20 10:52:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:25,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:25,649 INFO L225 Difference]: With dead ends: 2287 [2022-11-20 10:52:25,649 INFO L226 Difference]: Without dead ends: 2287 [2022-11-20 10:52:25,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:25,650 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:25,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:52:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-11-20 10:52:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2276. [2022-11-20 10:52:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2265 states have (on average 3.954083885209713) internal successors, (8956), 2275 states have internal predecessors, (8956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 8956 transitions. [2022-11-20 10:52:25,692 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 8956 transitions. Word has length 10 [2022-11-20 10:52:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:25,692 INFO L495 AbstractCegarLoop]: Abstraction has 2276 states and 8956 transitions. [2022-11-20 10:52:25,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 8956 transitions. [2022-11-20 10:52:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:25,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:25,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:25,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:25,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:25,895 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash -582230713, now seen corresponding path program 3 times [2022-11-20 10:52:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:25,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516864230] [2022-11-20 10:52:25,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:25,896 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 [2022-11-20 10:52:25,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:25,897 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:25,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:26,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:52:26,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:26,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:26,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:26,214 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:26,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:26,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:26,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:26,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516864230] [2022-11-20 10:52:26,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516864230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:26,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:26,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:52:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987070634] [2022-11-20 10:52:26,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:26,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:26,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:26,459 INFO L87 Difference]: Start difference. First operand 2276 states and 8956 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:26,650 INFO L93 Difference]: Finished difference Result 2276 states and 8945 transitions. [2022-11-20 10:52:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:26,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:26,657 INFO L225 Difference]: With dead ends: 2276 [2022-11-20 10:52:26,657 INFO L226 Difference]: Without dead ends: 2276 [2022-11-20 10:52:26,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:26,660 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:26,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:52:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2022-11-20 10:52:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2254. [2022-11-20 10:52:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2243 states have (on average 3.942041908158716) internal successors, (8842), 2253 states have internal predecessors, (8842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 8842 transitions. [2022-11-20 10:52:26,726 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 8842 transitions. Word has length 10 [2022-11-20 10:52:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:26,726 INFO L495 AbstractCegarLoop]: Abstraction has 2254 states and 8842 transitions. [2022-11-20 10:52:26,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 8842 transitions. [2022-11-20 10:52:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:26,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:26,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:26,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:26,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:26,940 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash -582156065, now seen corresponding path program 2 times [2022-11-20 10:52:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:26,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018588998] [2022-11-20 10:52:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:26,941 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 [2022-11-20 10:52:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:26,942 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:26,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:27,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:52:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:27,252 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:27,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:27,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:27,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018588998] [2022-11-20 10:52:27,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018588998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:27,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:27,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:52:27,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308719431] [2022-11-20 10:52:27,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:27,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:52:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:27,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:52:27,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:52:27,411 INFO L87 Difference]: Start difference. First operand 2254 states and 8842 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:27,628 INFO L93 Difference]: Finished difference Result 2233 states and 8743 transitions. [2022-11-20 10:52:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:52:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:27,634 INFO L225 Difference]: With dead ends: 2233 [2022-11-20 10:52:27,634 INFO L226 Difference]: Without dead ends: 2233 [2022-11-20 10:52:27,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:27,635 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:27,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-20 10:52:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-11-20 10:52:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2233. [2022-11-20 10:52:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2222 states have (on average 3.9347434743474348) internal successors, (8743), 2232 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8743 transitions. [2022-11-20 10:52:27,675 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8743 transitions. Word has length 10 [2022-11-20 10:52:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:27,675 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 8743 transitions. [2022-11-20 10:52:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8743 transitions. [2022-11-20 10:52:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:52:27,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:27,676 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:27,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:27,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:27,876 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1831694310, now seen corresponding path program 1 times [2022-11-20 10:52:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:27,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149744089] [2022-11-20 10:52:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:27,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:27,878 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:27,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:52:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:28,191 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:28,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:28,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:29,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:29,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149744089] [2022-11-20 10:52:29,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149744089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:29,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:29,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:52:29,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871947351] [2022-11-20 10:52:29,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:29,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:52:29,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:29,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:52:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:52:29,457 INFO L87 Difference]: Start difference. First operand 2233 states and 8743 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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) [2022-11-20 10:52:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:32,364 INFO L93 Difference]: Finished difference Result 2238 states and 8756 transitions. [2022-11-20 10:52:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:52:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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 [2022-11-20 10:52:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:32,372 INFO L225 Difference]: With dead ends: 2238 [2022-11-20 10:52:32,372 INFO L226 Difference]: Without dead ends: 2238 [2022-11-20 10:52:32,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:52:32,373 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:32,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 108 Unchecked, 1.7s Time] [2022-11-20 10:52:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2022-11-20 10:52:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2238. [2022-11-20 10:52:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2227 states have (on average 3.9317467444993266) internal successors, (8756), 2237 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8756 transitions. [2022-11-20 10:52:32,432 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8756 transitions. Word has length 10 [2022-11-20 10:52:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:32,432 INFO L495 AbstractCegarLoop]: Abstraction has 2238 states and 8756 transitions. [2022-11-20 10:52:32,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 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) [2022-11-20 10:52:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8756 transitions. [2022-11-20 10:52:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:52:32,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:32,434 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:32,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:32,646 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 806709069, now seen corresponding path program 1 times [2022-11-20 10:52:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:32,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474648342] [2022-11-20 10:52:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:32,647 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 [2022-11-20 10:52:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:32,648 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:32,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:52:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:32,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:32,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:33,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:34,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:34,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474648342] [2022-11-20 10:52:34,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474648342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:34,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:34,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:52:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606901759] [2022-11-20 10:52:34,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:34,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:52:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:52:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:52:34,593 INFO L87 Difference]: Start difference. First operand 2238 states and 8756 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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) [2022-11-20 10:52:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:42,537 INFO L93 Difference]: Finished difference Result 4513 states and 17489 transitions. [2022-11-20 10:52:42,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:52:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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 [2022-11-20 10:52:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:42,549 INFO L225 Difference]: With dead ends: 4513 [2022-11-20 10:52:42,549 INFO L226 Difference]: Without dead ends: 4513 [2022-11-20 10:52:42,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:52:42,550 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 438 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:42,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 142 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1012 Invalid, 0 Unknown, 301 Unchecked, 6.4s Time] [2022-11-20 10:52:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2022-11-20 10:52:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 2390. [2022-11-20 10:52:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2379 states have (on average 3.9188734762505253) internal successors, (9323), 2389 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 9323 transitions. [2022-11-20 10:52:42,635 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 9323 transitions. Word has length 11 [2022-11-20 10:52:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 2390 states and 9323 transitions. [2022-11-20 10:52:42,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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) [2022-11-20 10:52:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 9323 transitions. [2022-11-20 10:52:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:52:42,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:42,637 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:42,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:42,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:42,849 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash 391124619, now seen corresponding path program 2 times [2022-11-20 10:52:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:42,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448255674] [2022-11-20 10:52:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:42,850 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 [2022-11-20 10:52:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:42,851 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:42,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:43,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:52:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:43,189 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:43,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:43,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:44,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448255674] [2022-11-20 10:52:44,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448255674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:44,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:44,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:52:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475754073] [2022-11-20 10:52:44,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:44,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:52:44,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:52:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:52:44,793 INFO L87 Difference]: Start difference. First operand 2390 states and 9323 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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) [2022-11-20 10:52:56,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:56,547 INFO L93 Difference]: Finished difference Result 5618 states and 20371 transitions. [2022-11-20 10:52:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:52:56,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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 [2022-11-20 10:52:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:56,562 INFO L225 Difference]: With dead ends: 5618 [2022-11-20 10:52:56,562 INFO L226 Difference]: Without dead ends: 5618 [2022-11-20 10:52:56,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:52:56,563 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 734 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 624 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:56,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 173 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1156 Invalid, 0 Unknown, 624 Unchecked, 8.3s Time] [2022-11-20 10:52:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2022-11-20 10:52:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 2993. [2022-11-20 10:52:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2982 states have (on average 4.064721663313213) internal successors, (12121), 2992 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 12121 transitions. [2022-11-20 10:52:56,637 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 12121 transitions. Word has length 11 [2022-11-20 10:52:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:56,637 INFO L495 AbstractCegarLoop]: Abstraction has 2993 states and 12121 transitions. [2022-11-20 10:52:56,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 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) [2022-11-20 10:52:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 12121 transitions. [2022-11-20 10:52:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:52:56,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:56,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:56,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:56,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:56,839 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:56,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1975921098, now seen corresponding path program 1 times [2022-11-20 10:52:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:56,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781168579] [2022-11-20 10:52:56,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:56,840 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 [2022-11-20 10:52:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:56,840 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:56,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:57,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:52:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:57,161 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:57,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:52:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:57,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:58,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781168579] [2022-11-20 10:52:58,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781168579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:58,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:58,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:52:58,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388823859] [2022-11-20 10:52:58,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:58,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:52:58,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:52:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:52:58,128 INFO L87 Difference]: Start difference. First operand 2993 states and 12121 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2022-11-20 10:52:59,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:59,309 INFO L93 Difference]: Finished difference Result 3757 states and 15212 transitions. [2022-11-20 10:52:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:52:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2022-11-20 10:52:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:59,319 INFO L225 Difference]: With dead ends: 3757 [2022-11-20 10:52:59,319 INFO L226 Difference]: Without dead ends: 3757 [2022-11-20 10:52:59,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:52:59,320 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:59,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 38 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 158 Unchecked, 1.1s Time] [2022-11-20 10:52:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2022-11-20 10:52:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3569. [2022-11-20 10:52:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3558 states have (on average 4.113265879707701) internal successors, (14635), 3568 states have internal predecessors, (14635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 14635 transitions. [2022-11-20 10:52:59,397 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 14635 transitions. Word has length 11 [2022-11-20 10:52:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 14635 transitions. [2022-11-20 10:52:59,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2022-11-20 10:52:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 14635 transitions. [2022-11-20 10:52:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:52:59,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:59,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:59,612 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:52:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1978025688, now seen corresponding path program 2 times [2022-11-20 10:52:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:59,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768348653] [2022-11-20 10:52:59,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:59,613 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 [2022-11-20 10:52:59,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:59,614 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:52:59,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:52:59,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:52:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:59,925 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:52:59,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:00,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:00,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:00,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768348653] [2022-11-20 10:53:00,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768348653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:00,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:00,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:53:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648054748] [2022-11-20 10:53:00,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:53:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:53:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:53:00,700 INFO L87 Difference]: Start difference. First operand 3569 states and 14635 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) [2022-11-20 10:53:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:00,963 INFO L93 Difference]: Finished difference Result 3596 states and 14725 transitions. [2022-11-20 10:53:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:53:00,964 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 [2022-11-20 10:53:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:00,974 INFO L225 Difference]: With dead ends: 3596 [2022-11-20 10:53:00,974 INFO L226 Difference]: Without dead ends: 3596 [2022-11-20 10:53:00,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:53:00,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:00,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 10:53:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2022-11-20 10:53:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3578. [2022-11-20 10:53:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3567 states have (on average 4.1104569666386315) internal successors, (14662), 3577 states have internal predecessors, (14662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 14662 transitions. [2022-11-20 10:53:01,069 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 14662 transitions. Word has length 11 [2022-11-20 10:53:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:01,069 INFO L495 AbstractCegarLoop]: Abstraction has 3578 states and 14662 transitions. [2022-11-20 10:53:01,069 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) [2022-11-20 10:53:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 14662 transitions. [2022-11-20 10:53:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:01,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:01,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:01,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:01,271 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1816837158, now seen corresponding path program 3 times [2022-11-20 10:53:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613404315] [2022-11-20 10:53:01,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:01,272 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 [2022-11-20 10:53:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:01,273 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:01,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:01,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:53:01,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:53:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:01,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:01,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:01,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:02,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613404315] [2022-11-20 10:53:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613404315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:02,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:02,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:53:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623727324] [2022-11-20 10:53:02,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:02,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:53:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:53:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:53:02,402 INFO L87 Difference]: Start difference. First operand 3578 states and 14662 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) [2022-11-20 10:53:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:02,956 INFO L93 Difference]: Finished difference Result 3614 states and 14788 transitions. [2022-11-20 10:53:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:53:02,957 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 [2022-11-20 10:53:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:02,966 INFO L225 Difference]: With dead ends: 3614 [2022-11-20 10:53:02,966 INFO L226 Difference]: Without dead ends: 3614 [2022-11-20 10:53:02,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:53:02,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:02,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2022-11-20 10:53:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3614 states. [2022-11-20 10:53:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3614 to 3605. [2022-11-20 10:53:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3594 states have (on average 4.104618809126322) internal successors, (14752), 3604 states have internal predecessors, (14752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 14752 transitions. [2022-11-20 10:53:03,063 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 14752 transitions. Word has length 11 [2022-11-20 10:53:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:03,063 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 14752 transitions. [2022-11-20 10:53:03,063 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) [2022-11-20 10:53:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 14752 transitions. [2022-11-20 10:53:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:03,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:03,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:03,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:03,278 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:03,279 INFO L85 PathProgramCache]: Analyzing trace with hash -225059383, now seen corresponding path program 1 times [2022-11-20 10:53:03,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007059535] [2022-11-20 10:53:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:03,280 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 [2022-11-20 10:53:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:03,280 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:03,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:53:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:03,561 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:03,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:03,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:03,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007059535] [2022-11-20 10:53:03,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007059535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:03,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:03,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:53:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287819445] [2022-11-20 10:53:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:03,730 INFO L87 Difference]: Start difference. First operand 3605 states and 14752 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:03,937 INFO L93 Difference]: Finished difference Result 3606 states and 14754 transitions. [2022-11-20 10:53:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-11-20 10:53:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:03,947 INFO L225 Difference]: With dead ends: 3606 [2022-11-20 10:53:03,947 INFO L226 Difference]: Without dead ends: 3606 [2022-11-20 10:53:03,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:03,948 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-20 10:53:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2022-11-20 10:53:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3606. [2022-11-20 10:53:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3595 states have (on average 4.10403337969402) internal successors, (14754), 3605 states have internal predecessors, (14754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 14754 transitions. [2022-11-20 10:53:04,056 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 14754 transitions. Word has length 11 [2022-11-20 10:53:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:04,056 INFO L495 AbstractCegarLoop]: Abstraction has 3606 states and 14754 transitions. [2022-11-20 10:53:04,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 14754 transitions. [2022-11-20 10:53:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:04,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:04,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:04,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:04,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:04,258 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:04,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash -219835139, now seen corresponding path program 1 times [2022-11-20 10:53:04,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:04,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517848536] [2022-11-20 10:53:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:04,259 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 [2022-11-20 10:53:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:04,260 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:04,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:04,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:04,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:04,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:04,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517848536] [2022-11-20 10:53:04,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517848536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:04,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:04,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:04,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928714675] [2022-11-20 10:53:04,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:04,829 INFO L87 Difference]: Start difference. First operand 3606 states and 14754 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:05,012 INFO L93 Difference]: Finished difference Result 3623 states and 14831 transitions. [2022-11-20 10:53:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:05,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:05,027 INFO L225 Difference]: With dead ends: 3623 [2022-11-20 10:53:05,027 INFO L226 Difference]: Without dead ends: 3623 [2022-11-20 10:53:05,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:05,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:05,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:53:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2022-11-20 10:53:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3607. [2022-11-20 10:53:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3596 states have (on average 4.104004449388209) internal successors, (14758), 3606 states have internal predecessors, (14758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 14758 transitions. [2022-11-20 10:53:05,115 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 14758 transitions. Word has length 11 [2022-11-20 10:53:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:05,116 INFO L495 AbstractCegarLoop]: Abstraction has 3607 states and 14758 transitions. [2022-11-20 10:53:05,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 14758 transitions. [2022-11-20 10:53:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:05,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:05,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:05,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:05,317 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -219862109, now seen corresponding path program 2 times [2022-11-20 10:53:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684254323] [2022-11-20 10:53:05,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:05,318 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 [2022-11-20 10:53:05,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:05,319 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:05,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:05,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:05,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:05,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:05,656 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:05,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:05,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:05,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:05,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684254323] [2022-11-20 10:53:05,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684254323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:05,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:05,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937374722] [2022-11-20 10:53:05,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:05,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:05,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:05,897 INFO L87 Difference]: Start difference. First operand 3607 states and 14758 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:06,089 INFO L93 Difference]: Finished difference Result 3764 states and 15424 transitions. [2022-11-20 10:53:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:06,099 INFO L225 Difference]: With dead ends: 3764 [2022-11-20 10:53:06,099 INFO L226 Difference]: Without dead ends: 3764 [2022-11-20 10:53:06,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:06,100 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:06,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-20 10:53:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2022-11-20 10:53:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 3647. [2022-11-20 10:53:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3636 states have (on average 4.111661166116612) internal successors, (14950), 3646 states have internal predecessors, (14950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 14950 transitions. [2022-11-20 10:53:06,165 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 14950 transitions. Word has length 11 [2022-11-20 10:53:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:06,166 INFO L495 AbstractCegarLoop]: Abstraction has 3647 states and 14950 transitions. [2022-11-20 10:53:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 14950 transitions. [2022-11-20 10:53:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:06,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:06,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:06,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:06,368 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1365987975, now seen corresponding path program 3 times [2022-11-20 10:53:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920277982] [2022-11-20 10:53:06,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:06,369 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 [2022-11-20 10:53:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:06,370 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:06,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:06,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:53:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:06,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:06,697 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:06,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:06,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:06,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:06,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920277982] [2022-11-20 10:53:06,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920277982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:06,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:06,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168550248] [2022-11-20 10:53:06,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:06,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:06,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:06,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:06,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:06,965 INFO L87 Difference]: Start difference. First operand 3647 states and 14950 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:07,155 INFO L93 Difference]: Finished difference Result 3649 states and 14957 transitions. [2022-11-20 10:53:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:07,166 INFO L225 Difference]: With dead ends: 3649 [2022-11-20 10:53:07,166 INFO L226 Difference]: Without dead ends: 3649 [2022-11-20 10:53:07,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:07,166 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:07,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:53:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2022-11-20 10:53:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 3648. [2022-11-20 10:53:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3637 states have (on average 4.111355512785263) internal successors, (14953), 3647 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 14953 transitions. [2022-11-20 10:53:07,231 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 14953 transitions. Word has length 11 [2022-11-20 10:53:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:07,231 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 14953 transitions. [2022-11-20 10:53:07,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 14953 transitions. [2022-11-20 10:53:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:07,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:07,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:07,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:07,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:07,433 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:07,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1366053509, now seen corresponding path program 2 times [2022-11-20 10:53:07,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:07,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087599984] [2022-11-20 10:53:07,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:07,434 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 [2022-11-20 10:53:07,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:07,435 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:07,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:53:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:53:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:07,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:07,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:07,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:07,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087599984] [2022-11-20 10:53:07,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087599984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:07,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:07,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:53:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451077725] [2022-11-20 10:53:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:07,931 INFO L87 Difference]: Start difference. First operand 3648 states and 14953 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:08,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:08,140 INFO L93 Difference]: Finished difference Result 3645 states and 14944 transitions. [2022-11-20 10:53:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:08,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-11-20 10:53:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:08,150 INFO L225 Difference]: With dead ends: 3645 [2022-11-20 10:53:08,150 INFO L226 Difference]: Without dead ends: 3645 [2022-11-20 10:53:08,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:08,150 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:08,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-20 10:53:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2022-11-20 10:53:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 3644. [2022-11-20 10:53:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3633 states have (on average 4.112854390311037) internal successors, (14942), 3643 states have internal predecessors, (14942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 14942 transitions. [2022-11-20 10:53:08,225 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 14942 transitions. Word has length 11 [2022-11-20 10:53:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:08,225 INFO L495 AbstractCegarLoop]: Abstraction has 3644 states and 14942 transitions. [2022-11-20 10:53:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 14942 transitions. [2022-11-20 10:53:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:08,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:08,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:08,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:08,428 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1205670855, now seen corresponding path program 4 times [2022-11-20 10:53:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312908970] [2022-11-20 10:53:08,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:53:08,428 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 [2022-11-20 10:53:08,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:08,429 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:08,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:08,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:53:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:08,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:08,719 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:08,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:08,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:08,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312908970] [2022-11-20 10:53:08,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312908970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:08,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:08,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:08,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562309389] [2022-11-20 10:53:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:08,959 INFO L87 Difference]: Start difference. First operand 3644 states and 14942 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:09,159 INFO L93 Difference]: Finished difference Result 3648 states and 14958 transitions. [2022-11-20 10:53:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:09,169 INFO L225 Difference]: With dead ends: 3648 [2022-11-20 10:53:09,169 INFO L226 Difference]: Without dead ends: 3648 [2022-11-20 10:53:09,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:09,170 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:09,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-20 10:53:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2022-11-20 10:53:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3644. [2022-11-20 10:53:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3633 states have (on average 4.112854390311037) internal successors, (14942), 3643 states have internal predecessors, (14942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 14942 transitions. [2022-11-20 10:53:09,244 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 14942 transitions. Word has length 11 [2022-11-20 10:53:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:09,244 INFO L495 AbstractCegarLoop]: Abstraction has 3644 states and 14942 transitions. [2022-11-20 10:53:09,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 14942 transitions. [2022-11-20 10:53:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:09,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:09,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:09,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:09,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:09,446 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1206506925, now seen corresponding path program 5 times [2022-11-20 10:53:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:09,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579067326] [2022-11-20 10:53:09,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:53:09,447 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 [2022-11-20 10:53:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:09,448 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:09,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:09,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:09,741 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:09,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:09,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:09,976 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579067326] [2022-11-20 10:53:09,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579067326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:09,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:09,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79676843] [2022-11-20 10:53:09,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:09,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:09,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:09,977 INFO L87 Difference]: Start difference. First operand 3644 states and 14942 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:10,164 INFO L93 Difference]: Finished difference Result 3709 states and 15226 transitions. [2022-11-20 10:53:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:10,174 INFO L225 Difference]: With dead ends: 3709 [2022-11-20 10:53:10,174 INFO L226 Difference]: Without dead ends: 3709 [2022-11-20 10:53:10,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:10,175 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:10,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 10:53:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2022-11-20 10:53:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 3643. [2022-11-20 10:53:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 3632 states have (on average 4.1131607929515415) internal successors, (14939), 3642 states have internal predecessors, (14939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 14939 transitions. [2022-11-20 10:53:10,284 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 14939 transitions. Word has length 11 [2022-11-20 10:53:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:10,284 INFO L495 AbstractCegarLoop]: Abstraction has 3643 states and 14939 transitions. [2022-11-20 10:53:10,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 14939 transitions. [2022-11-20 10:53:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:10,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:10,286 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:10,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:10,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:10,486 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1139625276, now seen corresponding path program 2 times [2022-11-20 10:53:10,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:10,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311445213] [2022-11-20 10:53:10,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:10,487 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 [2022-11-20 10:53:10,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:10,488 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:10,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:10,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:53:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:53:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:10,844 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:10,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:11,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:12,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:12,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311445213] [2022-11-20 10:53:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311445213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:12,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:12,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-20 10:53:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449322988] [2022-11-20 10:53:12,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:12,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:53:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:53:12,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:53:12,209 INFO L87 Difference]: Start difference. First operand 3643 states and 14939 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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) [2022-11-20 10:53:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:18,122 INFO L93 Difference]: Finished difference Result 4259 states and 17698 transitions. [2022-11-20 10:53:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:53:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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 [2022-11-20 10:53:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:18,135 INFO L225 Difference]: With dead ends: 4259 [2022-11-20 10:53:18,135 INFO L226 Difference]: Without dead ends: 4259 [2022-11-20 10:53:18,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:53:18,135 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 99 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:18,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 120 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 816 Invalid, 0 Unknown, 273 Unchecked, 5.2s Time] [2022-11-20 10:53:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2022-11-20 10:53:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3678. [2022-11-20 10:53:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3667 states have (on average 4.108262885192255) internal successors, (15065), 3677 states have internal predecessors, (15065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 15065 transitions. [2022-11-20 10:53:18,218 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 15065 transitions. Word has length 11 [2022-11-20 10:53:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:18,219 INFO L495 AbstractCegarLoop]: Abstraction has 3678 states and 15065 transitions. [2022-11-20 10:53:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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) [2022-11-20 10:53:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 15065 transitions. [2022-11-20 10:53:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:18,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:18,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:18,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:18,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:18,421 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -842980095, now seen corresponding path program 1 times [2022-11-20 10:53:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:18,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634405758] [2022-11-20 10:53:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:18,422 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 [2022-11-20 10:53:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:18,423 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:18,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:18,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:18,723 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:18,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:18,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:18,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634405758] [2022-11-20 10:53:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634405758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084576950] [2022-11-20 10:53:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:18,965 INFO L87 Difference]: Start difference. First operand 3678 states and 15065 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:19,132 INFO L93 Difference]: Finished difference Result 3731 states and 15359 transitions. [2022-11-20 10:53:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:19,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:19,142 INFO L225 Difference]: With dead ends: 3731 [2022-11-20 10:53:19,143 INFO L226 Difference]: Without dead ends: 3731 [2022-11-20 10:53:19,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:19,143 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:19,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:53:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-11-20 10:53:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3690. [2022-11-20 10:53:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3690 states, 3679 states have (on average 4.1117151399836915) internal successors, (15127), 3689 states have internal predecessors, (15127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3690 states to 3690 states and 15127 transitions. [2022-11-20 10:53:19,203 INFO L78 Accepts]: Start accepts. Automaton has 3690 states and 15127 transitions. Word has length 11 [2022-11-20 10:53:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:19,203 INFO L495 AbstractCegarLoop]: Abstraction has 3690 states and 15127 transitions. [2022-11-20 10:53:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states and 15127 transitions. [2022-11-20 10:53:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:19,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:19,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:19,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:19,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:19,405 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash -843097275, now seen corresponding path program 2 times [2022-11-20 10:53:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817697356] [2022-11-20 10:53:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:19,406 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 [2022-11-20 10:53:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:19,407 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:19,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:19,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:19,695 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:19,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:19,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:19,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:19,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817697356] [2022-11-20 10:53:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817697356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:19,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:19,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667243835] [2022-11-20 10:53:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:19,923 INFO L87 Difference]: Start difference. First operand 3690 states and 15127 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:20,079 INFO L93 Difference]: Finished difference Result 3758 states and 15480 transitions. [2022-11-20 10:53:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:20,090 INFO L225 Difference]: With dead ends: 3758 [2022-11-20 10:53:20,090 INFO L226 Difference]: Without dead ends: 3758 [2022-11-20 10:53:20,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:20,090 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:20,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:53:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2022-11-20 10:53:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3702. [2022-11-20 10:53:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3691 states have (on average 4.118396098618261) internal successors, (15201), 3701 states have internal predecessors, (15201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 15201 transitions. [2022-11-20 10:53:20,193 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 15201 transitions. Word has length 11 [2022-11-20 10:53:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:20,193 INFO L495 AbstractCegarLoop]: Abstraction has 3702 states and 15201 transitions. [2022-11-20 10:53:20,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 15201 transitions. [2022-11-20 10:53:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:20,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:20,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:20,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:20,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:20,395 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:20,396 INFO L85 PathProgramCache]: Analyzing trace with hash -843096159, now seen corresponding path program 1 times [2022-11-20 10:53:20,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:20,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625441671] [2022-11-20 10:53:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:20,396 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 [2022-11-20 10:53:20,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:20,397 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:20,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:20,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:20,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:20,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:20,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:20,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625441671] [2022-11-20 10:53:20,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625441671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:20,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:20,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:20,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424737894] [2022-11-20 10:53:20,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:20,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:20,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:20,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:20,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:20,920 INFO L87 Difference]: Start difference. First operand 3702 states and 15201 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:21,099 INFO L93 Difference]: Finished difference Result 3718 states and 15290 transitions. [2022-11-20 10:53:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:21,115 INFO L225 Difference]: With dead ends: 3718 [2022-11-20 10:53:21,115 INFO L226 Difference]: Without dead ends: 3718 [2022-11-20 10:53:21,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:21,116 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:21,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:53:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2022-11-20 10:53:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3710. [2022-11-20 10:53:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3699 states have (on average 4.118410381184104) internal successors, (15234), 3709 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 15234 transitions. [2022-11-20 10:53:21,291 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 15234 transitions. Word has length 11 [2022-11-20 10:53:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:21,291 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 15234 transitions. [2022-11-20 10:53:21,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 15234 transitions. [2022-11-20 10:53:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:21,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:21,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:21,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:21,493 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -842945499, now seen corresponding path program 2 times [2022-11-20 10:53:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43979363] [2022-11-20 10:53:21,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:21,494 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 [2022-11-20 10:53:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:21,495 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:21,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:21,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:21,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:21,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:21,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:22,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:22,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:22,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43979363] [2022-11-20 10:53:22,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43979363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:22,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:22,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266601457] [2022-11-20 10:53:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:22,026 INFO L87 Difference]: Start difference. First operand 3710 states and 15234 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:22,182 INFO L93 Difference]: Finished difference Result 3738 states and 15372 transitions. [2022-11-20 10:53:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:22,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:22,193 INFO L225 Difference]: With dead ends: 3738 [2022-11-20 10:53:22,193 INFO L226 Difference]: Without dead ends: 3738 [2022-11-20 10:53:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:22,193 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:53:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2022-11-20 10:53:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3710. [2022-11-20 10:53:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3699 states have (on average 4.118410381184104) internal successors, (15234), 3709 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 15234 transitions. [2022-11-20 10:53:22,258 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 15234 transitions. Word has length 11 [2022-11-20 10:53:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:22,258 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 15234 transitions. [2022-11-20 10:53:22,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 15234 transitions. [2022-11-20 10:53:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:22,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:22,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:22,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:22,463 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -839734395, now seen corresponding path program 3 times [2022-11-20 10:53:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:22,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672153239] [2022-11-20 10:53:22,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:22,464 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 [2022-11-20 10:53:22,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:22,465 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:22,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:22,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:53:22,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:22,825 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:22,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:23,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:23,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:23,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672153239] [2022-11-20 10:53:23,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672153239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:23,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:23,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:23,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793270424] [2022-11-20 10:53:23,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:23,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:23,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:23,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:23,060 INFO L87 Difference]: Start difference. First operand 3710 states and 15234 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:23,219 INFO L93 Difference]: Finished difference Result 3746 states and 15419 transitions. [2022-11-20 10:53:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:23,230 INFO L225 Difference]: With dead ends: 3746 [2022-11-20 10:53:23,230 INFO L226 Difference]: Without dead ends: 3746 [2022-11-20 10:53:23,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:23,230 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:23,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:53:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2022-11-20 10:53:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 3722. [2022-11-20 10:53:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3711 states have (on average 4.118296954998653) internal successors, (15283), 3721 states have internal predecessors, (15283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 15283 transitions. [2022-11-20 10:53:23,298 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 15283 transitions. Word has length 11 [2022-11-20 10:53:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:23,298 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 15283 transitions. [2022-11-20 10:53:23,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 15283 transitions. [2022-11-20 10:53:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:23,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:23,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:23,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:23,501 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -843472065, now seen corresponding path program 4 times [2022-11-20 10:53:23,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:23,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631139466] [2022-11-20 10:53:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:53:23,502 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 [2022-11-20 10:53:23,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:23,503 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:23,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:23,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:53:23,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:23,839 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:23,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:24,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:24,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:24,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631139466] [2022-11-20 10:53:24,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631139466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:24,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:24,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:24,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731887197] [2022-11-20 10:53:24,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:24,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:24,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:24,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:24,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:24,113 INFO L87 Difference]: Start difference. First operand 3722 states and 15283 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:24,297 INFO L93 Difference]: Finished difference Result 3792 states and 15566 transitions. [2022-11-20 10:53:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-20 10:53:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:24,311 INFO L225 Difference]: With dead ends: 3792 [2022-11-20 10:53:24,311 INFO L226 Difference]: Without dead ends: 3792 [2022-11-20 10:53:24,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:24,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:24,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-20 10:53:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-11-20 10:53:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3686. [2022-11-20 10:53:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3675 states have (on average 4.1020408163265305) internal successors, (15075), 3685 states have internal predecessors, (15075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 15075 transitions. [2022-11-20 10:53:24,393 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 15075 transitions. Word has length 11 [2022-11-20 10:53:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:24,394 INFO L495 AbstractCegarLoop]: Abstraction has 3686 states and 15075 transitions. [2022-11-20 10:53:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:53:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 15075 transitions. [2022-11-20 10:53:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:24,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:24,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:24,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:24,596 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -843382041, now seen corresponding path program 1 times [2022-11-20 10:53:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188598076] [2022-11-20 10:53:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:24,597 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 [2022-11-20 10:53:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:24,598 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:24,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:53:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:24,915 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:25,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:25,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188598076] [2022-11-20 10:53:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188598076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:25,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:25,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:53:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664753730] [2022-11-20 10:53:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:25,086 INFO L87 Difference]: Start difference. First operand 3686 states and 15075 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:25,315 INFO L93 Difference]: Finished difference Result 3686 states and 15066 transitions. [2022-11-20 10:53:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-11-20 10:53:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:25,324 INFO L225 Difference]: With dead ends: 3686 [2022-11-20 10:53:25,325 INFO L226 Difference]: Without dead ends: 3686 [2022-11-20 10:53:25,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:25,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:25,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 10:53:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2022-11-20 10:53:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3686. [2022-11-20 10:53:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3675 states have (on average 4.099591836734694) internal successors, (15066), 3685 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:25,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 15066 transitions. [2022-11-20 10:53:25,393 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 15066 transitions. Word has length 11 [2022-11-20 10:53:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:25,394 INFO L495 AbstractCegarLoop]: Abstraction has 3686 states and 15066 transitions. [2022-11-20 10:53:25,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 15066 transitions. [2022-11-20 10:53:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:53:25,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:25,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:25,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:25,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:25,596 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:25,596 INFO L85 PathProgramCache]: Analyzing trace with hash -869300211, now seen corresponding path program 2 times [2022-11-20 10:53:25,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:25,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043337912] [2022-11-20 10:53:25,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:25,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:25,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:25,597 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:25,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:25,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:53:25,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:53:25,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:25,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:25,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:26,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:26,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:26,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043337912] [2022-11-20 10:53:26,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043337912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:26,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:26,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:53:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691149686] [2022-11-20 10:53:26,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:26,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:26,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:26,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:26,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:26,097 INFO L87 Difference]: Start difference. First operand 3686 states and 15066 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:26,301 INFO L93 Difference]: Finished difference Result 3670 states and 14971 transitions. [2022-11-20 10:53:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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 [2022-11-20 10:53:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:26,311 INFO L225 Difference]: With dead ends: 3670 [2022-11-20 10:53:26,311 INFO L226 Difference]: Without dead ends: 3670 [2022-11-20 10:53:26,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:26,312 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:26,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-20 10:53:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-11-20 10:53:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3670. [2022-11-20 10:53:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3659 states have (on average 4.091555069691172) internal successors, (14971), 3669 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 14971 transitions. [2022-11-20 10:53:26,416 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 14971 transitions. Word has length 11 [2022-11-20 10:53:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:26,416 INFO L495 AbstractCegarLoop]: Abstraction has 3670 states and 14971 transitions. [2022-11-20 10:53:26,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-20 10:53:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 14971 transitions. [2022-11-20 10:53:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:53:26,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:26,417 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 10:53:26,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:26,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:26,618 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 535410268, now seen corresponding path program 3 times [2022-11-20 10:53:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:26,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350619575] [2022-11-20 10:53:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:26,619 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 [2022-11-20 10:53:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:26,620 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:26,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:26,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:53:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:53:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:27,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:27,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:27,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:30,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:30,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350619575] [2022-11-20 10:53:30,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350619575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:30,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:30,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 10:53:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714456232] [2022-11-20 10:53:30,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:53:30,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:53:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:53:30,317 INFO L87 Difference]: Start difference. First operand 3670 states and 14971 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) [2022-11-20 10:53:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:54,703 INFO L93 Difference]: Finished difference Result 20200 states and 79182 transitions. [2022-11-20 10:53:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:53:54,704 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 [2022-11-20 10:53:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:54,771 INFO L225 Difference]: With dead ends: 20200 [2022-11-20 10:53:54,772 INFO L226 Difference]: Without dead ends: 20200 [2022-11-20 10:53:54,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:53:54,772 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3617 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3617 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:54,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3617 Valid, 393 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-11-20 10:53:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20200 states. [2022-11-20 10:53:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20200 to 3682. [2022-11-20 10:53:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3671 states have (on average 4.0847180604739854) internal successors, (14995), 3681 states have internal predecessors, (14995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 14995 transitions. [2022-11-20 10:53:54,974 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 14995 transitions. Word has length 12 [2022-11-20 10:53:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:54,974 INFO L495 AbstractCegarLoop]: Abstraction has 3682 states and 14995 transitions. [2022-11-20 10:53:54,974 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) [2022-11-20 10:53:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 14995 transitions. [2022-11-20 10:53:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:53:54,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:54,976 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:54,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:55,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:55,179 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1718727268, now seen corresponding path program 2 times [2022-11-20 10:53:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924967501] [2022-11-20 10:53:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:55,179 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 [2022-11-20 10:53:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:55,180 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:55,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:55,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:53:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:53:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:55,498 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:55,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:53:55,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:55,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924967501] [2022-11-20 10:53:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924967501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:55,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:55,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244904552] [2022-11-20 10:53:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:55,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:55,754 INFO L87 Difference]: Start difference. First operand 3682 states and 14995 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:56,198 INFO L93 Difference]: Finished difference Result 4415 states and 17967 transitions. [2022-11-20 10:53:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:53:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 10:53:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:56,211 INFO L225 Difference]: With dead ends: 4415 [2022-11-20 10:53:56,211 INFO L226 Difference]: Without dead ends: 4415 [2022-11-20 10:53:56,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:53:56,211 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:56,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:53:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2022-11-20 10:53:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 3349. [2022-11-20 10:53:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3338 states have (on average 4.113241461953265) internal successors, (13730), 3348 states have internal predecessors, (13730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 13730 transitions. [2022-11-20 10:53:56,276 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 13730 transitions. Word has length 12 [2022-11-20 10:53:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:56,276 INFO L495 AbstractCegarLoop]: Abstraction has 3349 states and 13730 transitions. [2022-11-20 10:53:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 13730 transitions. [2022-11-20 10:53:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:53:56,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:56,277 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-20 10:53:56,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:53:56,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:56,478 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:53:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1200153665, now seen corresponding path program 3 times [2022-11-20 10:53:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102563810] [2022-11-20 10:53:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:53:56,479 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 [2022-11-20 10:53:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:56,480 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:53:56,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:53:56,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:53:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:53:56,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:56,962 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:53:56,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:53:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:53:57,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:53:57,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:57,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102563810] [2022-11-20 10:53:57,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102563810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:57,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:57,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:53:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484974892] [2022-11-20 10:53:57,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:53:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:53:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:53:57,824 INFO L87 Difference]: Start difference. First operand 3349 states and 13730 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 10:54:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:04,226 INFO L93 Difference]: Finished difference Result 3826 states and 14495 transitions. [2022-11-20 10:54:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:54:04,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 12 [2022-11-20 10:54:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:04,237 INFO L225 Difference]: With dead ends: 3826 [2022-11-20 10:54:04,237 INFO L226 Difference]: Without dead ends: 3826 [2022-11-20 10:54:04,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:54:04,238 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 368 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:04,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 139 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 829 Invalid, 0 Unknown, 287 Unchecked, 5.4s Time] [2022-11-20 10:54:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2022-11-20 10:54:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2927. [2022-11-20 10:54:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2916 states have (on average 3.9722222222222223) internal successors, (11583), 2926 states have internal predecessors, (11583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 11583 transitions. [2022-11-20 10:54:04,297 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 11583 transitions. Word has length 12 [2022-11-20 10:54:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:04,297 INFO L495 AbstractCegarLoop]: Abstraction has 2927 states and 11583 transitions. [2022-11-20 10:54:04,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 10:54:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 11583 transitions. [2022-11-20 10:54:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:04,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:04,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:04,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:04,499 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash -907719419, now seen corresponding path program 1 times [2022-11-20 10:54:04,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375549411] [2022-11-20 10:54:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:04,500 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 [2022-11-20 10:54:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:04,501 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:04,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:54:04,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:04,858 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:04,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:05,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:05,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375549411] [2022-11-20 10:54:05,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375549411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:05,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:05,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:54:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155438096] [2022-11-20 10:54:05,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:54:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:54:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:54:05,851 INFO L87 Difference]: Start difference. First operand 2927 states and 11583 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:06,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:06,557 INFO L93 Difference]: Finished difference Result 2981 states and 11833 transitions. [2022-11-20 10:54:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:54:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-20 10:54:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:06,566 INFO L225 Difference]: With dead ends: 2981 [2022-11-20 10:54:06,566 INFO L226 Difference]: Without dead ends: 2981 [2022-11-20 10:54:06,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:06,567 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:06,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 35 Unchecked, 0.6s Time] [2022-11-20 10:54:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2022-11-20 10:54:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2963. [2022-11-20 10:54:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2952 states have (on average 3.9796747967479673) internal successors, (11748), 2962 states have internal predecessors, (11748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 11748 transitions. [2022-11-20 10:54:06,615 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 11748 transitions. Word has length 12 [2022-11-20 10:54:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:06,616 INFO L495 AbstractCegarLoop]: Abstraction has 2963 states and 11748 transitions. [2022-11-20 10:54:06,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 11748 transitions. [2022-11-20 10:54:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:06,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:06,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:06,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:06,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:06,818 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:06,818 INFO L85 PathProgramCache]: Analyzing trace with hash -985776535, now seen corresponding path program 2 times [2022-11-20 10:54:06,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:06,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781232631] [2022-11-20 10:54:06,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:06,819 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 [2022-11-20 10:54:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:06,820 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:06,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:07,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:54:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:07,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:07,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:07,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:08,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781232631] [2022-11-20 10:54:08,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781232631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:08,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:08,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:54:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705886031] [2022-11-20 10:54:08,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:08,032 INFO L87 Difference]: Start difference. First operand 2963 states and 11748 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) [2022-11-20 10:54:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:08,674 INFO L93 Difference]: Finished difference Result 3022 states and 11998 transitions. [2022-11-20 10:54:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:54:08,676 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 [2022-11-20 10:54:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:08,683 INFO L225 Difference]: With dead ends: 3022 [2022-11-20 10:54:08,683 INFO L226 Difference]: Without dead ends: 3022 [2022-11-20 10:54:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:08,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:08,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2022-11-20 10:54:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-11-20 10:54:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 3001. [2022-11-20 10:54:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2990 states have (on average 3.9866220735785953) internal successors, (11920), 3000 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 11920 transitions. [2022-11-20 10:54:08,735 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 11920 transitions. Word has length 12 [2022-11-20 10:54:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:08,735 INFO L495 AbstractCegarLoop]: Abstraction has 3001 states and 11920 transitions. [2022-11-20 10:54:08,735 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) [2022-11-20 10:54:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 11920 transitions. [2022-11-20 10:54:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:08,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:08,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:08,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:08,940 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -988029925, now seen corresponding path program 3 times [2022-11-20 10:54:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:08,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384272805] [2022-11-20 10:54:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:08,941 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 [2022-11-20 10:54:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:08,942 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:08,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:09,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:54:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:09,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:54:09,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:09,386 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:09,386 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:09,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:10,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384272805] [2022-11-20 10:54:10,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384272805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:10,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:10,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:54:10,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014464172] [2022-11-20 10:54:10,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:10,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:10,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:10,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:10,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:10,207 INFO L87 Difference]: Start difference. First operand 3001 states and 11920 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) [2022-11-20 10:54:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:10,853 INFO L93 Difference]: Finished difference Result 3043 states and 12096 transitions. [2022-11-20 10:54:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:54:10,855 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 [2022-11-20 10:54:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:10,890 INFO L225 Difference]: With dead ends: 3043 [2022-11-20 10:54:10,890 INFO L226 Difference]: Without dead ends: 3043 [2022-11-20 10:54:10,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:10,890 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:10,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-20 10:54:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2022-11-20 10:54:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 3018. [2022-11-20 10:54:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3007 states have (on average 3.99002327901563) internal successors, (11998), 3017 states have internal predecessors, (11998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 11998 transitions. [2022-11-20 10:54:10,941 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 11998 transitions. Word has length 12 [2022-11-20 10:54:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:10,941 INFO L495 AbstractCegarLoop]: Abstraction has 3018 states and 11998 transitions. [2022-11-20 10:54:10,941 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) [2022-11-20 10:54:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 11998 transitions. [2022-11-20 10:54:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:10,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:10,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:10,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:11,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:11,144 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1189255914, now seen corresponding path program 1 times [2022-11-20 10:54:11,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:11,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115805000] [2022-11-20 10:54:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:11,145 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 [2022-11-20 10:54:11,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:11,146 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:11,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:54:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:11,485 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:11,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:11,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:12,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:12,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115805000] [2022-11-20 10:54:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115805000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:12,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:12,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:54:12,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063181160] [2022-11-20 10:54:12,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:12,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:54:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:12,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:54:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:54:12,511 INFO L87 Difference]: Start difference. First operand 3018 states and 11998 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:13,645 INFO L93 Difference]: Finished difference Result 3519 states and 13951 transitions. [2022-11-20 10:54:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:54:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-20 10:54:13,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:13,656 INFO L225 Difference]: With dead ends: 3519 [2022-11-20 10:54:13,656 INFO L226 Difference]: Without dead ends: 3519 [2022-11-20 10:54:13,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:13,656 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:13,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 83 Unchecked, 1.1s Time] [2022-11-20 10:54:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2022-11-20 10:54:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3004. [2022-11-20 10:54:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2993 states have (on average 3.9625793518209154) internal successors, (11860), 3003 states have internal predecessors, (11860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 11860 transitions. [2022-11-20 10:54:13,713 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 11860 transitions. Word has length 12 [2022-11-20 10:54:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:13,713 INFO L495 AbstractCegarLoop]: Abstraction has 3004 states and 11860 transitions. [2022-11-20 10:54:13,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 11860 transitions. [2022-11-20 10:54:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:13,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:13,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:13,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:13,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:13,916 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:13,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash -463790260, now seen corresponding path program 2 times [2022-11-20 10:54:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:13,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667955604] [2022-11-20 10:54:13,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:13,917 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 [2022-11-20 10:54:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:13,918 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:13,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:14,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:54:14,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:14,280 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:14,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:15,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667955604] [2022-11-20 10:54:15,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667955604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:15,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:15,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:54:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092670273] [2022-11-20 10:54:15,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:15,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:15,106 INFO L87 Difference]: Start difference. First operand 3004 states and 11860 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) [2022-11-20 10:54:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:15,666 INFO L93 Difference]: Finished difference Result 3076 states and 12168 transitions. [2022-11-20 10:54:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:54:15,667 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 [2022-11-20 10:54:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:15,675 INFO L225 Difference]: With dead ends: 3076 [2022-11-20 10:54:15,675 INFO L226 Difference]: Without dead ends: 3076 [2022-11-20 10:54:15,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:15,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:15,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-20 10:54:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-11-20 10:54:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3039. [2022-11-20 10:54:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3028 states have (on average 3.9699471598414795) internal successors, (12021), 3038 states have internal predecessors, (12021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12021 transitions. [2022-11-20 10:54:15,726 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12021 transitions. Word has length 12 [2022-11-20 10:54:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:15,726 INFO L495 AbstractCegarLoop]: Abstraction has 3039 states and 12021 transitions. [2022-11-20 10:54:15,726 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) [2022-11-20 10:54:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12021 transitions. [2022-11-20 10:54:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:15,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:15,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:15,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:15,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:15,928 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash -489708430, now seen corresponding path program 3 times [2022-11-20 10:54:15,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:15,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137775897] [2022-11-20 10:54:15,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:15,929 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 [2022-11-20 10:54:15,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:15,930 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:16,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:54:16,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:16,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:54:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:16,297 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:16,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:16,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:17,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:17,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137775897] [2022-11-20 10:54:17,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137775897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:17,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:17,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:54:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980300134] [2022-11-20 10:54:17,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:17,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:17,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:17,107 INFO L87 Difference]: Start difference. First operand 3039 states and 12021 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) [2022-11-20 10:54:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:17,701 INFO L93 Difference]: Finished difference Result 3090 states and 12238 transitions. [2022-11-20 10:54:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:54:17,702 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 [2022-11-20 10:54:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:17,710 INFO L225 Difference]: With dead ends: 3090 [2022-11-20 10:54:17,710 INFO L226 Difference]: Without dead ends: 3090 [2022-11-20 10:54:17,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:17,711 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:17,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-11-20 10:54:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2022-11-20 10:54:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 3039. [2022-11-20 10:54:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3028 states have (on average 3.97225891677675) internal successors, (12028), 3038 states have internal predecessors, (12028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12028 transitions. [2022-11-20 10:54:17,807 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12028 transitions. Word has length 12 [2022-11-20 10:54:17,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:17,807 INFO L495 AbstractCegarLoop]: Abstraction has 3039 states and 12028 transitions. [2022-11-20 10:54:17,808 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) [2022-11-20 10:54:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12028 transitions. [2022-11-20 10:54:17,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:17,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:17,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:17,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:18,010 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -487378780, now seen corresponding path program 4 times [2022-11-20 10:54:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137456449] [2022-11-20 10:54:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:18,011 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 [2022-11-20 10:54:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:18,012 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:18,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:18,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:54:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:18,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:18,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:18,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:19,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137456449] [2022-11-20 10:54:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137456449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:19,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:19,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:54:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207373986] [2022-11-20 10:54:19,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:19,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:54:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:54:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:54:19,358 INFO L87 Difference]: Start difference. First operand 3039 states and 12028 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:20,323 INFO L93 Difference]: Finished difference Result 3533 states and 14132 transitions. [2022-11-20 10:54:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:54:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-20 10:54:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:20,332 INFO L225 Difference]: With dead ends: 3533 [2022-11-20 10:54:20,332 INFO L226 Difference]: Without dead ends: 3533 [2022-11-20 10:54:20,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:20,333 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:20,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 105 Unchecked, 0.9s Time] [2022-11-20 10:54:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2022-11-20 10:54:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 3025. [2022-11-20 10:54:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3014 states have (on average 3.9674850696748507) internal successors, (11958), 3024 states have internal predecessors, (11958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 11958 transitions. [2022-11-20 10:54:20,384 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 11958 transitions. Word has length 12 [2022-11-20 10:54:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:20,384 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 11958 transitions. [2022-11-20 10:54:20,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 10:54:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 11958 transitions. [2022-11-20 10:54:20,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:20,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:20,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:20,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:54:20,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:20,587 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:20,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1615201198, now seen corresponding path program 1 times [2022-11-20 10:54:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017087039] [2022-11-20 10:54:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:20,588 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 [2022-11-20 10:54:20,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:20,589 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:20,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:54:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:20,914 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:20,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:21,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:21,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:21,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017087039] [2022-11-20 10:54:21,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017087039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:21,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:21,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445054420] [2022-11-20 10:54:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:21,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:21,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:21,107 INFO L87 Difference]: Start difference. First operand 3025 states and 11958 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:21,317 INFO L93 Difference]: Finished difference Result 3028 states and 11965 transitions. [2022-11-20 10:54:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:21,353 INFO L225 Difference]: With dead ends: 3028 [2022-11-20 10:54:21,353 INFO L226 Difference]: Without dead ends: 3028 [2022-11-20 10:54:21,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:21,353 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:21,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-20 10:54:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2022-11-20 10:54:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3027. [2022-11-20 10:54:21,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3027 states, 3016 states have (on average 3.966180371352785) internal successors, (11962), 3026 states have internal predecessors, (11962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3027 states to 3027 states and 11962 transitions. [2022-11-20 10:54:21,401 INFO L78 Accepts]: Start accepts. Automaton has 3027 states and 11962 transitions. Word has length 12 [2022-11-20 10:54:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:21,402 INFO L495 AbstractCegarLoop]: Abstraction has 3027 states and 11962 transitions. [2022-11-20 10:54:21,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3027 states and 11962 transitions. [2022-11-20 10:54:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:21,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:21,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:21,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:21,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:21,604 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1775055147, now seen corresponding path program 1 times [2022-11-20 10:54:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:21,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387611802] [2022-11-20 10:54:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:21,605 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 [2022-11-20 10:54:21,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:21,606 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:21,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 10:54:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:21,930 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:21,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:22,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:22,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387611802] [2022-11-20 10:54:22,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387611802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:22,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:22,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844890315] [2022-11-20 10:54:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:22,190 INFO L87 Difference]: Start difference. First operand 3027 states and 11962 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:22,350 INFO L93 Difference]: Finished difference Result 3044 states and 12035 transitions. [2022-11-20 10:54:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:22,358 INFO L225 Difference]: With dead ends: 3044 [2022-11-20 10:54:22,358 INFO L226 Difference]: Without dead ends: 3044 [2022-11-20 10:54:22,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:22,359 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 10:54:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-20 10:54:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 3028. [2022-11-20 10:54:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3017 states have (on average 3.966191581040769) internal successors, (11966), 3027 states have internal predecessors, (11966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 11966 transitions. [2022-11-20 10:54:22,408 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 11966 transitions. Word has length 12 [2022-11-20 10:54:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:22,408 INFO L495 AbstractCegarLoop]: Abstraction has 3028 states and 11966 transitions. [2022-11-20 10:54:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 11966 transitions. [2022-11-20 10:54:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:22,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:22,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:22,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:22,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:22,611 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1775163740, now seen corresponding path program 1 times [2022-11-20 10:54:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:22,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64974650] [2022-11-20 10:54:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:22,612 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 [2022-11-20 10:54:22,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:22,613 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 10:54:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:22,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:22,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:22,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:23,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:23,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:23,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64974650] [2022-11-20 10:54:23,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64974650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:23,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:23,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215011463] [2022-11-20 10:54:23,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:23,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:23,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:23,205 INFO L87 Difference]: Start difference. First operand 3028 states and 11966 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:23,383 INFO L93 Difference]: Finished difference Result 3046 states and 12040 transitions. [2022-11-20 10:54:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:23,391 INFO L225 Difference]: With dead ends: 3046 [2022-11-20 10:54:23,392 INFO L226 Difference]: Without dead ends: 3046 [2022-11-20 10:54:23,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:23,392 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:23,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:54:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-11-20 10:54:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 3029. [2022-11-20 10:54:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3018 states have (on average 3.966202783300199) internal successors, (11970), 3028 states have internal predecessors, (11970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 11970 transitions. [2022-11-20 10:54:23,468 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 11970 transitions. Word has length 12 [2022-11-20 10:54:23,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:23,468 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 11970 transitions. [2022-11-20 10:54:23,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 11970 transitions. [2022-11-20 10:54:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:23,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:23,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:23,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-20 10:54:23,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:23,670 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1775043057, now seen corresponding path program 2 times [2022-11-20 10:54:23,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:23,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661619568] [2022-11-20 10:54:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:23,671 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 [2022-11-20 10:54:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:23,672 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:23,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 10:54:23,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:23,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:24,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:24,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:24,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661619568] [2022-11-20 10:54:24,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661619568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:24,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:24,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545416265] [2022-11-20 10:54:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:24,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:24,262 INFO L87 Difference]: Start difference. First operand 3029 states and 11970 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:24,443 INFO L93 Difference]: Finished difference Result 3051 states and 12077 transitions. [2022-11-20 10:54:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:24,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:24,452 INFO L225 Difference]: With dead ends: 3051 [2022-11-20 10:54:24,452 INFO L226 Difference]: Without dead ends: 3051 [2022-11-20 10:54:24,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:24,452 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:24,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 10:54:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-11-20 10:54:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3030. [2022-11-20 10:54:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3019 states have (on average 3.9662139781384567) internal successors, (11974), 3029 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 11974 transitions. [2022-11-20 10:54:24,510 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 11974 transitions. Word has length 12 [2022-11-20 10:54:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:24,510 INFO L495 AbstractCegarLoop]: Abstraction has 3030 states and 11974 transitions. [2022-11-20 10:54:24,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 11974 transitions. [2022-11-20 10:54:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:24,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:24,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:24,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-20 10:54:24,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:24,713 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1775046560, now seen corresponding path program 2 times [2022-11-20 10:54:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602046651] [2022-11-20 10:54:24,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:24,713 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 [2022-11-20 10:54:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:24,714 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:24,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 10:54:24,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:24,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:25,099 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:25,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:25,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:25,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602046651] [2022-11-20 10:54:25,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602046651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:25,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:25,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917966356] [2022-11-20 10:54:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:25,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:25,394 INFO L87 Difference]: Start difference. First operand 3030 states and 11974 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:25,603 INFO L93 Difference]: Finished difference Result 3051 states and 12063 transitions. [2022-11-20 10:54:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:25,612 INFO L225 Difference]: With dead ends: 3051 [2022-11-20 10:54:25,612 INFO L226 Difference]: Without dead ends: 3051 [2022-11-20 10:54:25,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:25,612 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:25,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 10:54:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-11-20 10:54:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3030. [2022-11-20 10:54:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3019 states have (on average 3.9662139781384567) internal successors, (11974), 3029 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 11974 transitions. [2022-11-20 10:54:25,689 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 11974 transitions. Word has length 12 [2022-11-20 10:54:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:25,689 INFO L495 AbstractCegarLoop]: Abstraction has 3030 states and 11974 transitions. [2022-11-20 10:54:25,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 11974 transitions. [2022-11-20 10:54:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:25,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:25,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:25,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-20 10:54:25,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:25,891 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1774285138, now seen corresponding path program 2 times [2022-11-20 10:54:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050345009] [2022-11-20 10:54:25,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:25,892 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 [2022-11-20 10:54:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:25,893 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 10:54:26,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:26,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:26,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:26,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:26,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:26,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050345009] [2022-11-20 10:54:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050345009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:26,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084860259] [2022-11-20 10:54:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:26,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:26,447 INFO L87 Difference]: Start difference. First operand 3030 states and 11974 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:26,666 INFO L93 Difference]: Finished difference Result 3033 states and 11982 transitions. [2022-11-20 10:54:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:26,675 INFO L225 Difference]: With dead ends: 3033 [2022-11-20 10:54:26,675 INFO L226 Difference]: Without dead ends: 3033 [2022-11-20 10:54:26,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:26,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:26,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-20 10:54:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2022-11-20 10:54:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 3030. [2022-11-20 10:54:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3019 states have (on average 3.9662139781384567) internal successors, (11974), 3029 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 11974 transitions. [2022-11-20 10:54:26,736 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 11974 transitions. Word has length 12 [2022-11-20 10:54:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:26,736 INFO L495 AbstractCegarLoop]: Abstraction has 3030 states and 11974 transitions. [2022-11-20 10:54:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 11974 transitions. [2022-11-20 10:54:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:26,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:26,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:26,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-20 10:54:26,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:26,938 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash 604043509, now seen corresponding path program 3 times [2022-11-20 10:54:26,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:26,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818405274] [2022-11-20 10:54:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:26,939 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 [2022-11-20 10:54:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:26,940 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 10:54:27,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:54:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:27,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:27,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:27,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:27,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818405274] [2022-11-20 10:54:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818405274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:27,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:27,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:27,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413562364] [2022-11-20 10:54:27,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:27,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:27,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:27,553 INFO L87 Difference]: Start difference. First operand 3030 states and 11974 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:27,743 INFO L93 Difference]: Finished difference Result 3032 states and 11982 transitions. [2022-11-20 10:54:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:27,752 INFO L225 Difference]: With dead ends: 3032 [2022-11-20 10:54:27,752 INFO L226 Difference]: Without dead ends: 3032 [2022-11-20 10:54:27,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:27,752 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:27,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:54:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-11-20 10:54:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 3031. [2022-11-20 10:54:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3020 states have (on average 3.9662251655629137) internal successors, (11978), 3030 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 11978 transitions. [2022-11-20 10:54:27,831 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 11978 transitions. Word has length 12 [2022-11-20 10:54:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:27,832 INFO L495 AbstractCegarLoop]: Abstraction has 3031 states and 11978 transitions. [2022-11-20 10:54:27,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 11978 transitions. [2022-11-20 10:54:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:27,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:27,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:27,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-20 10:54:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:28,034 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash 604047012, now seen corresponding path program 3 times [2022-11-20 10:54:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:28,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144514267] [2022-11-20 10:54:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:28,035 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 [2022-11-20 10:54:28,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:28,036 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 10:54:28,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:54:28,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:28,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:28,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:28,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:28,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144514267] [2022-11-20 10:54:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144514267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:28,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:28,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:28,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007226797] [2022-11-20 10:54:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:28,650 INFO L87 Difference]: Start difference. First operand 3031 states and 11978 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:28,821 INFO L93 Difference]: Finished difference Result 3032 states and 11982 transitions. [2022-11-20 10:54:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:28,828 INFO L225 Difference]: With dead ends: 3032 [2022-11-20 10:54:28,828 INFO L226 Difference]: Without dead ends: 3032 [2022-11-20 10:54:28,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:28,829 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:28,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:54:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-11-20 10:54:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 3030. [2022-11-20 10:54:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3019 states have (on average 3.9662139781384567) internal successors, (11974), 3029 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 11974 transitions. [2022-11-20 10:54:28,875 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 11974 transitions. Word has length 12 [2022-11-20 10:54:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:28,876 INFO L495 AbstractCegarLoop]: Abstraction has 3030 states and 11974 transitions. [2022-11-20 10:54:28,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 11974 transitions. [2022-11-20 10:54:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:28,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:28,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:28,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-20 10:54:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:29,078 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 604121660, now seen corresponding path program 3 times [2022-11-20 10:54:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:29,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717575999] [2022-11-20 10:54:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:29,079 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 [2022-11-20 10:54:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:29,079 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:29,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 10:54:29,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:54:29,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:29,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:29,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:29,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:29,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:29,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:29,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717575999] [2022-11-20 10:54:29,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717575999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:29,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:29,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:29,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732014358] [2022-11-20 10:54:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:29,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:29,644 INFO L87 Difference]: Start difference. First operand 3030 states and 11974 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:29,859 INFO L93 Difference]: Finished difference Result 3051 states and 12022 transitions. [2022-11-20 10:54:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:29,867 INFO L225 Difference]: With dead ends: 3051 [2022-11-20 10:54:29,867 INFO L226 Difference]: Without dead ends: 3051 [2022-11-20 10:54:29,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:29,868 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:29,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-11-20 10:54:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-11-20 10:54:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3042. [2022-11-20 10:54:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3031 states have (on average 3.9627185747278126) internal successors, (12011), 3041 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 12011 transitions. [2022-11-20 10:54:29,944 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 12011 transitions. Word has length 12 [2022-11-20 10:54:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:29,945 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 12011 transitions. [2022-11-20 10:54:29,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 12011 transitions. [2022-11-20 10:54:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:29,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:29,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:29,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:30,147 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1279145013, now seen corresponding path program 4 times [2022-11-20 10:54:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:30,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915454366] [2022-11-20 10:54:30,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:30,148 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 [2022-11-20 10:54:30,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:30,149 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:30,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-20 10:54:30,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:30,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:30,502 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:30,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:30,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:30,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:30,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915454366] [2022-11-20 10:54:30,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915454366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:30,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:30,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45375672] [2022-11-20 10:54:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:30,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:30,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:30,808 INFO L87 Difference]: Start difference. First operand 3042 states and 12011 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:30,973 INFO L93 Difference]: Finished difference Result 3060 states and 12085 transitions. [2022-11-20 10:54:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:30,982 INFO L225 Difference]: With dead ends: 3060 [2022-11-20 10:54:30,982 INFO L226 Difference]: Without dead ends: 3060 [2022-11-20 10:54:30,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:30,982 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:30,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:54:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2022-11-20 10:54:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3042. [2022-11-20 10:54:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3031 states have (on average 3.9627185747278126) internal successors, (12011), 3041 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 12011 transitions. [2022-11-20 10:54:31,036 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 12011 transitions. Word has length 12 [2022-11-20 10:54:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 12011 transitions. [2022-11-20 10:54:31,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 12011 transitions. [2022-11-20 10:54:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:31,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:31,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:31,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:31,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:31,239 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1282511396, now seen corresponding path program 4 times [2022-11-20 10:54:31,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:31,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144012648] [2022-11-20 10:54:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:31,240 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:31,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-20 10:54:31,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:31,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:31,610 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:31,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:31,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:31,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:31,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144012648] [2022-11-20 10:54:31,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144012648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:31,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:31,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:31,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325109830] [2022-11-20 10:54:31,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:31,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:31,893 INFO L87 Difference]: Start difference. First operand 3042 states and 12011 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:32,082 INFO L93 Difference]: Finished difference Result 3060 states and 12084 transitions. [2022-11-20 10:54:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:32,090 INFO L225 Difference]: With dead ends: 3060 [2022-11-20 10:54:32,090 INFO L226 Difference]: Without dead ends: 3060 [2022-11-20 10:54:32,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:32,091 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:32,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 10:54:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2022-11-20 10:54:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3042. [2022-11-20 10:54:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3031 states have (on average 3.9627185747278126) internal successors, (12011), 3041 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 12011 transitions. [2022-11-20 10:54:32,170 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 12011 transitions. Word has length 12 [2022-11-20 10:54:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:32,170 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 12011 transitions. [2022-11-20 10:54:32,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:32,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 12011 transitions. [2022-11-20 10:54:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:32,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:32,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:32,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:32,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:32,385 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1278770223, now seen corresponding path program 5 times [2022-11-20 10:54:32,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:32,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444740905] [2022-11-20 10:54:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:54:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:32,387 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:32,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-20 10:54:32,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:32,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:32,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:32,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:32,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:32,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:32,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:32,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444740905] [2022-11-20 10:54:32,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444740905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:32,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:32,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:32,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782582962] [2022-11-20 10:54:32,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:32,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:32,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:32,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:32,987 INFO L87 Difference]: Start difference. First operand 3042 states and 12011 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:33,166 INFO L93 Difference]: Finished difference Result 3063 states and 12111 transitions. [2022-11-20 10:54:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:33,174 INFO L225 Difference]: With dead ends: 3063 [2022-11-20 10:54:33,174 INFO L226 Difference]: Without dead ends: 3063 [2022-11-20 10:54:33,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:33,174 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:33,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:54:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2022-11-20 10:54:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 3042. [2022-11-20 10:54:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3031 states have (on average 3.9627185747278126) internal successors, (12011), 3041 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 12011 transitions. [2022-11-20 10:54:33,227 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 12011 transitions. Word has length 12 [2022-11-20 10:54:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:33,227 INFO L495 AbstractCegarLoop]: Abstraction has 3042 states and 12011 transitions. [2022-11-20 10:54:33,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 12011 transitions. [2022-11-20 10:54:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:33,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:33,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:33,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:33,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:33,429 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1278878816, now seen corresponding path program 5 times [2022-11-20 10:54:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:33,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345032276] [2022-11-20 10:54:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:54:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:33,431 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:33,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-20 10:54:33,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:33,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:33,775 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:33,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:34,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:34,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345032276] [2022-11-20 10:54:34,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345032276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:34,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980390908] [2022-11-20 10:54:34,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:34,027 INFO L87 Difference]: Start difference. First operand 3042 states and 12011 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:34,207 INFO L93 Difference]: Finished difference Result 3065 states and 12104 transitions. [2022-11-20 10:54:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:34,215 INFO L225 Difference]: With dead ends: 3065 [2022-11-20 10:54:34,215 INFO L226 Difference]: Without dead ends: 3065 [2022-11-20 10:54:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:34,215 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:34,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-20 10:54:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-11-20 10:54:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3045. [2022-11-20 10:54:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3045 states, 3034 states have (on average 3.962425840474621) internal successors, (12022), 3044 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 12022 transitions. [2022-11-20 10:54:34,291 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 12022 transitions. Word has length 12 [2022-11-20 10:54:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:34,291 INFO L495 AbstractCegarLoop]: Abstraction has 3045 states and 12022 transitions. [2022-11-20 10:54:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 12022 transitions. [2022-11-20 10:54:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:34,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:34,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:34,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:34,494 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1256843644, now seen corresponding path program 4 times [2022-11-20 10:54:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:34,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675182375] [2022-11-20 10:54:34,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:34,495 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 [2022-11-20 10:54:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:34,496 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:34,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-20 10:54:34,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:34,865 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:34,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:35,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:35,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:35,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675182375] [2022-11-20 10:54:35,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675182375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:35,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:35,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:35,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47903] [2022-11-20 10:54:35,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:35,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:35,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:35,061 INFO L87 Difference]: Start difference. First operand 3045 states and 12022 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:35,274 INFO L93 Difference]: Finished difference Result 3053 states and 12041 transitions. [2022-11-20 10:54:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:35,282 INFO L225 Difference]: With dead ends: 3053 [2022-11-20 10:54:35,282 INFO L226 Difference]: Without dead ends: 3053 [2022-11-20 10:54:35,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:35,282 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:35,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-20 10:54:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-11-20 10:54:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3046. [2022-11-20 10:54:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3035 states have (on average 3.9621087314662273) internal successors, (12025), 3045 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 12025 transitions. [2022-11-20 10:54:35,336 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 12025 transitions. Word has length 12 [2022-11-20 10:54:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:35,336 INFO L495 AbstractCegarLoop]: Abstraction has 3046 states and 12025 transitions. [2022-11-20 10:54:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 12025 transitions. [2022-11-20 10:54:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:35,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:35,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:35,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:35,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:35,543 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -362576776, now seen corresponding path program 1 times [2022-11-20 10:54:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885579511] [2022-11-20 10:54:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:35,543 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 [2022-11-20 10:54:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:35,544 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:35,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 10:54:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:35,892 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:35,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:36,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:36,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:36,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885579511] [2022-11-20 10:54:36,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885579511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:36,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:36,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732627049] [2022-11-20 10:54:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:36,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:36,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:36,151 INFO L87 Difference]: Start difference. First operand 3046 states and 12025 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:36,302 INFO L93 Difference]: Finished difference Result 3097 states and 12235 transitions. [2022-11-20 10:54:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:36,310 INFO L225 Difference]: With dead ends: 3097 [2022-11-20 10:54:36,310 INFO L226 Difference]: Without dead ends: 3097 [2022-11-20 10:54:36,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:36,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:36,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:54:36,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2022-11-20 10:54:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3046. [2022-11-20 10:54:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3035 states have (on average 3.9621087314662273) internal successors, (12025), 3045 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 12025 transitions. [2022-11-20 10:54:36,394 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 12025 transitions. Word has length 12 [2022-11-20 10:54:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:36,394 INFO L495 AbstractCegarLoop]: Abstraction has 3046 states and 12025 transitions. [2022-11-20 10:54:36,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 12025 transitions. [2022-11-20 10:54:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:36,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:36,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:36,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:36,597 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:36,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash -362426116, now seen corresponding path program 2 times [2022-11-20 10:54:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:36,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258521552] [2022-11-20 10:54:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:36,598 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 [2022-11-20 10:54:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:36,599 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:36,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-20 10:54:36,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:36,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:36,955 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:36,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:37,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:37,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:37,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258521552] [2022-11-20 10:54:37,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258521552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:37,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:37,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382086802] [2022-11-20 10:54:37,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:37,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:37,215 INFO L87 Difference]: Start difference. First operand 3046 states and 12025 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:37,398 INFO L93 Difference]: Finished difference Result 3118 states and 12301 transitions. [2022-11-20 10:54:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:37,430 INFO L225 Difference]: With dead ends: 3118 [2022-11-20 10:54:37,430 INFO L226 Difference]: Without dead ends: 3118 [2022-11-20 10:54:37,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:37,431 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:37,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:54:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2022-11-20 10:54:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3039. [2022-11-20 10:54:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 3028 states have (on average 3.96664464993395) internal successors, (12011), 3038 states have internal predecessors, (12011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 12011 transitions. [2022-11-20 10:54:37,502 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 12011 transitions. Word has length 12 [2022-11-20 10:54:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:37,502 INFO L495 AbstractCegarLoop]: Abstraction has 3039 states and 12011 transitions. [2022-11-20 10:54:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 12011 transitions. [2022-11-20 10:54:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:37,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:37,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:37,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:37,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:37,717 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash -366209356, now seen corresponding path program 3 times [2022-11-20 10:54:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:37,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944634932] [2022-11-20 10:54:37,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:37,718 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 [2022-11-20 10:54:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:37,719 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:37,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-20 10:54:37,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:54:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:38,069 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:38,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:38,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:38,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:38,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944634932] [2022-11-20 10:54:38,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944634932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:38,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:38,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360004315] [2022-11-20 10:54:38,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:38,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:38,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:38,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:38,348 INFO L87 Difference]: Start difference. First operand 3039 states and 12011 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:38,520 INFO L93 Difference]: Finished difference Result 3095 states and 12250 transitions. [2022-11-20 10:54:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:38,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:38,534 INFO L225 Difference]: With dead ends: 3095 [2022-11-20 10:54:38,534 INFO L226 Difference]: Without dead ends: 3095 [2022-11-20 10:54:38,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:38,535 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:38,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:54:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2022-11-20 10:54:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 3029. [2022-11-20 10:54:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3018 states have (on average 3.9615639496355204) internal successors, (11956), 3028 states have internal predecessors, (11956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 11956 transitions. [2022-11-20 10:54:38,618 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 11956 transitions. Word has length 12 [2022-11-20 10:54:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:38,618 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 11956 transitions. [2022-11-20 10:54:38,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 11956 transitions. [2022-11-20 10:54:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:38,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:38,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:38,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:38,821 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash -361505416, now seen corresponding path program 4 times [2022-11-20 10:54:38,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921401849] [2022-11-20 10:54:38,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:38,822 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 [2022-11-20 10:54:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:38,822 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:38,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 10:54:39,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:39,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:39,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:39,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:39,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:39,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:39,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921401849] [2022-11-20 10:54:39,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921401849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:39,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:39,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:39,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297731058] [2022-11-20 10:54:39,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:39,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:39,421 INFO L87 Difference]: Start difference. First operand 3029 states and 11956 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:39,574 INFO L93 Difference]: Finished difference Result 3110 states and 12299 transitions. [2022-11-20 10:54:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:39,584 INFO L225 Difference]: With dead ends: 3110 [2022-11-20 10:54:39,584 INFO L226 Difference]: Without dead ends: 3110 [2022-11-20 10:54:39,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:39,584 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:39,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 10:54:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2022-11-20 10:54:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 3012. [2022-11-20 10:54:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3001 states have (on average 3.963345551482839) internal successors, (11894), 3011 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 11894 transitions. [2022-11-20 10:54:39,634 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 11894 transitions. Word has length 12 [2022-11-20 10:54:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:39,634 INFO L495 AbstractCegarLoop]: Abstraction has 3012 states and 11894 transitions. [2022-11-20 10:54:39,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 11894 transitions. [2022-11-20 10:54:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:39,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:39,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:39,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-20 10:54:39,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:39,837 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -261960076, now seen corresponding path program 5 times [2022-11-20 10:54:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247538019] [2022-11-20 10:54:39,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:54:39,838 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 [2022-11-20 10:54:39,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:39,839 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:39,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-20 10:54:40,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:54:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:40,195 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:40,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:40,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:40,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247538019] [2022-11-20 10:54:40,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247538019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:40,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:40,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:40,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967162378] [2022-11-20 10:54:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:40,460 INFO L87 Difference]: Start difference. First operand 3012 states and 11894 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:40,649 INFO L93 Difference]: Finished difference Result 3150 states and 12507 transitions. [2022-11-20 10:54:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:40,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-20 10:54:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:40,659 INFO L225 Difference]: With dead ends: 3150 [2022-11-20 10:54:40,660 INFO L226 Difference]: Without dead ends: 3150 [2022-11-20 10:54:40,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:40,660 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:40,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-20 10:54:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-11-20 10:54:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2986. [2022-11-20 10:54:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2975 states have (on average 3.96) internal successors, (11781), 2985 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 11781 transitions. [2022-11-20 10:54:40,766 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 11781 transitions. Word has length 12 [2022-11-20 10:54:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:40,767 INFO L495 AbstractCegarLoop]: Abstraction has 2986 states and 11781 transitions. [2022-11-20 10:54:40,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-20 10:54:40,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 11781 transitions. [2022-11-20 10:54:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:40,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:40,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:40,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:40,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:40,981 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash -261871168, now seen corresponding path program 1 times [2022-11-20 10:54:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:40,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295333923] [2022-11-20 10:54:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:40,982 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 [2022-11-20 10:54:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:40,983 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:40,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-20 10:54:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:41,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:41,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:41,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:41,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:41,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:41,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295333923] [2022-11-20 10:54:41,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295333923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:41,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:41,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:41,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419096412] [2022-11-20 10:54:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:41,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:41,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:41,527 INFO L87 Difference]: Start difference. First operand 2986 states and 11781 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:41,728 INFO L93 Difference]: Finished difference Result 2993 states and 11802 transitions. [2022-11-20 10:54:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:41,737 INFO L225 Difference]: With dead ends: 2993 [2022-11-20 10:54:41,737 INFO L226 Difference]: Without dead ends: 2993 [2022-11-20 10:54:41,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:41,737 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:41,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-20 10:54:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-11-20 10:54:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2989. [2022-11-20 10:54:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2978 states have (on average 3.9583613163196776) internal successors, (11788), 2988 states have internal predecessors, (11788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 11788 transitions. [2022-11-20 10:54:41,787 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 11788 transitions. Word has length 12 [2022-11-20 10:54:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:41,787 INFO L495 AbstractCegarLoop]: Abstraction has 2989 states and 11788 transitions. [2022-11-20 10:54:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 11788 transitions. [2022-11-20 10:54:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:54:41,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:41,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:41,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-20 10:54:41,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:41,989 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash -374481148, now seen corresponding path program 2 times [2022-11-20 10:54:41,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189143701] [2022-11-20 10:54:41,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:41,990 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 [2022-11-20 10:54:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:41,991 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:42,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 10:54:42,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:42,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:42,393 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:42,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:42,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:42,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:42,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189143701] [2022-11-20 10:54:42,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189143701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:42,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:42,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:42,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138118938] [2022-11-20 10:54:42,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:42,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:42,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:42,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:42,577 INFO L87 Difference]: Start difference. First operand 2989 states and 11788 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:42,777 INFO L93 Difference]: Finished difference Result 2979 states and 11744 transitions. [2022-11-20 10:54:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:54:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2022-11-20 10:54:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:42,785 INFO L225 Difference]: With dead ends: 2979 [2022-11-20 10:54:42,785 INFO L226 Difference]: Without dead ends: 2979 [2022-11-20 10:54:42,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:42,785 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:42,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 10:54:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2022-11-20 10:54:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2974. [2022-11-20 10:54:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2963 states have (on average 3.9574755315558554) internal successors, (11726), 2973 states have internal predecessors, (11726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 11726 transitions. [2022-11-20 10:54:42,834 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 11726 transitions. Word has length 12 [2022-11-20 10:54:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:42,834 INFO L495 AbstractCegarLoop]: Abstraction has 2974 states and 11726 transitions. [2022-11-20 10:54:42,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2022-11-20 10:54:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 11726 transitions. [2022-11-20 10:54:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:54:42,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:42,835 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:42,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-20 10:54:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:43,036 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash -552288447, now seen corresponding path program 2 times [2022-11-20 10:54:43,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:43,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847737921] [2022-11-20 10:54:43,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:43,037 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 [2022-11-20 10:54:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:43,038 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:43,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 10:54:43,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:43,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:54:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:43,427 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-20 10:54:43,428 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 15 treesize of output 39 [2022-11-20 10:54:43,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 10:54:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:54:43,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:43,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:43,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847737921] [2022-11-20 10:54:43,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847737921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:43,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:43,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583408552] [2022-11-20 10:54:43,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:43,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:54:43,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:54:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:43,719 INFO L87 Difference]: Start difference. First operand 2974 states and 11726 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) [2022-11-20 10:54:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:44,120 INFO L93 Difference]: Finished difference Result 3059 states and 11937 transitions. [2022-11-20 10:54:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:54:44,121 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 13 [2022-11-20 10:54:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:44,131 INFO L225 Difference]: With dead ends: 3059 [2022-11-20 10:54:44,131 INFO L226 Difference]: Without dead ends: 3059 [2022-11-20 10:54:44,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:54:44,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:44,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:54:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2022-11-20 10:54:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2959. [2022-11-20 10:54:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2950 states have (on average 3.963050847457627) internal successors, (11691), 2958 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 11691 transitions. [2022-11-20 10:54:44,201 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 11691 transitions. Word has length 13 [2022-11-20 10:54:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:44,202 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 11691 transitions. [2022-11-20 10:54:44,202 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) [2022-11-20 10:54:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 11691 transitions. [2022-11-20 10:54:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:54:44,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:44,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 10:54:44,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:44,404 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash -145061101, now seen corresponding path program 4 times [2022-11-20 10:54:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964883797] [2022-11-20 10:54:44,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:44,404 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 [2022-11-20 10:54:44,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:44,405 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:44,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-20 10:54:44,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:44,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:44,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:54:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:44,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:44,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:54:45,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:54:46,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:46,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964883797] [2022-11-20 10:54:46,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964883797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:46,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:46,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:54:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173646670] [2022-11-20 10:54:46,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:54:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:54:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:54:46,443 INFO L87 Difference]: Start difference. First operand 2959 states and 11691 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 10:54:57,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:57,032 INFO L93 Difference]: Finished difference Result 5581 states and 20964 transitions. [2022-11-20 10:54:57,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:54:57,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 13 [2022-11-20 10:54:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:57,048 INFO L225 Difference]: With dead ends: 5581 [2022-11-20 10:54:57,048 INFO L226 Difference]: Without dead ends: 5581 [2022-11-20 10:54:57,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:54:57,049 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1108 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:57,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 71 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-20 10:54:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2022-11-20 10:54:57,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 3085. [2022-11-20 10:54:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3076 states have (on average 4.080949284785436) internal successors, (12553), 3084 states have internal predecessors, (12553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 12553 transitions. [2022-11-20 10:54:57,147 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 12553 transitions. Word has length 13 [2022-11-20 10:54:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:57,148 INFO L495 AbstractCegarLoop]: Abstraction has 3085 states and 12553 transitions. [2022-11-20 10:54:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2022-11-20 10:54:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 12553 transitions. [2022-11-20 10:54:57,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:54:57,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:57,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:57,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-20 10:54:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:57,357 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:54:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1580960309, now seen corresponding path program 1 times [2022-11-20 10:54:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:57,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059082235] [2022-11-20 10:54:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:57,358 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 [2022-11-20 10:54:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:57,360 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:54:57,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-20 10:54:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:54:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:57,765 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:54:57,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:54:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:58,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:00,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:00,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059082235] [2022-11-20 10:55:00,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059082235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:00,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:00,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:55:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425460881] [2022-11-20 10:55:00,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:55:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:00,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:55:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:55:00,804 INFO L87 Difference]: Start difference. First operand 3085 states and 12553 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:55:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:19,851 INFO L93 Difference]: Finished difference Result 9055 states and 38278 transitions. [2022-11-20 10:55:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:55:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 [2022-11-20 10:55:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:19,883 INFO L225 Difference]: With dead ends: 9055 [2022-11-20 10:55:19,883 INFO L226 Difference]: Without dead ends: 9055 [2022-11-20 10:55:19,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:55:19,884 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 622 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:19,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 207 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1290 Invalid, 0 Unknown, 317 Unchecked, 6.5s Time] [2022-11-20 10:55:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2022-11-20 10:55:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5206. [2022-11-20 10:55:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5206 states, 5197 states have (on average 4.32614970175101) internal successors, (22483), 5205 states have internal predecessors, (22483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 22483 transitions. [2022-11-20 10:55:20,008 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 22483 transitions. Word has length 13 [2022-11-20 10:55:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 5206 states and 22483 transitions. [2022-11-20 10:55:20,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:55:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 22483 transitions. [2022-11-20 10:55:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:20,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:20,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:20,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-20 10:55:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:20,211 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1226932846, now seen corresponding path program 1 times [2022-11-20 10:55:20,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:20,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784040184] [2022-11-20 10:55:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:20,212 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 [2022-11-20 10:55:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:20,212 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:20,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-20 10:55:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:55:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:20,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:20,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:20,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:21,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:21,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784040184] [2022-11-20 10:55:21,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784040184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:21,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:21,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:55:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426302705] [2022-11-20 10:55:21,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:21,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:55:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:55:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:55:21,694 INFO L87 Difference]: Start difference. First operand 5206 states and 22483 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:22,427 INFO L93 Difference]: Finished difference Result 5386 states and 23232 transitions. [2022-11-20 10:55:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:55:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:55:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:22,444 INFO L225 Difference]: With dead ends: 5386 [2022-11-20 10:55:22,444 INFO L226 Difference]: Without dead ends: 5386 [2022-11-20 10:55:22,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:22,445 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:22,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2022-11-20 10:55:22,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2022-11-20 10:55:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 5221. [2022-11-20 10:55:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 5212 states have (on average 4.321181887950883) internal successors, (22522), 5220 states have internal predecessors, (22522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 22522 transitions. [2022-11-20 10:55:22,580 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 22522 transitions. Word has length 13 [2022-11-20 10:55:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:22,580 INFO L495 AbstractCegarLoop]: Abstraction has 5221 states and 22522 transitions. [2022-11-20 10:55:22,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 22522 transitions. [2022-11-20 10:55:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:22,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:22,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:22,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-20 10:55:22,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:22,787 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1927040324, now seen corresponding path program 2 times [2022-11-20 10:55:22,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:22,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164904989] [2022-11-20 10:55:22,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:55:22,788 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 [2022-11-20 10:55:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:22,789 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:22,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-20 10:55:23,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:23,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:23,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:23,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:23,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:23,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:24,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164904989] [2022-11-20 10:55:24,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164904989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:24,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:24,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:55:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927331373] [2022-11-20 10:55:24,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:55:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:55:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:55:24,051 INFO L87 Difference]: Start difference. First operand 5221 states and 22522 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) [2022-11-20 10:55:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:24,634 INFO L93 Difference]: Finished difference Result 5398 states and 23265 transitions. [2022-11-20 10:55:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:24,636 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 [2022-11-20 10:55:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:24,651 INFO L225 Difference]: With dead ends: 5398 [2022-11-20 10:55:24,651 INFO L226 Difference]: Without dead ends: 5398 [2022-11-20 10:55:24,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:24,651 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:24,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-20 10:55:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2022-11-20 10:55:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5228. [2022-11-20 10:55:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5219 states have (on average 4.320367886568308) internal successors, (22548), 5227 states have internal predecessors, (22548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 22548 transitions. [2022-11-20 10:55:24,748 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 22548 transitions. Word has length 13 [2022-11-20 10:55:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:24,749 INFO L495 AbstractCegarLoop]: Abstraction has 5228 states and 22548 transitions. [2022-11-20 10:55:24,749 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) [2022-11-20 10:55:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 22548 transitions. [2022-11-20 10:55:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:24,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:24,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:24,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:24,951 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1927576562, now seen corresponding path program 1 times [2022-11-20 10:55:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:24,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8384422] [2022-11-20 10:55:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:24,952 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 [2022-11-20 10:55:24,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:24,953 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:24,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 10:55:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:55:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:25,370 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:25,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:25,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:26,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8384422] [2022-11-20 10:55:26,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8384422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:26,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:26,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:55:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392584599] [2022-11-20 10:55:26,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:55:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:55:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:55:26,486 INFO L87 Difference]: Start difference. First operand 5228 states and 22548 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:27,056 INFO L93 Difference]: Finished difference Result 5830 states and 25223 transitions. [2022-11-20 10:55:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:55:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:55:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:27,074 INFO L225 Difference]: With dead ends: 5830 [2022-11-20 10:55:27,074 INFO L226 Difference]: Without dead ends: 5830 [2022-11-20 10:55:27,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:27,075 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:27,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 35 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-20 10:55:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2022-11-20 10:55:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5421. [2022-11-20 10:55:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5421 states, 5412 states have (on average 4.3407243163340725) internal successors, (23492), 5420 states have internal predecessors, (23492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5421 states to 5421 states and 23492 transitions. [2022-11-20 10:55:27,178 INFO L78 Accepts]: Start accepts. Automaton has 5421 states and 23492 transitions. Word has length 13 [2022-11-20 10:55:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:27,179 INFO L495 AbstractCegarLoop]: Abstraction has 5421 states and 23492 transitions. [2022-11-20 10:55:27,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5421 states and 23492 transitions. [2022-11-20 10:55:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:27,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:27,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:27,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:27,382 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1925471414, now seen corresponding path program 3 times [2022-11-20 10:55:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590378278] [2022-11-20 10:55:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:55:27,382 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 [2022-11-20 10:55:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:27,383 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-20 10:55:27,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:55:27,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:27,805 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:27,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:28,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:28,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590378278] [2022-11-20 10:55:28,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590378278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:28,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:28,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:55:28,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439095004] [2022-11-20 10:55:28,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:55:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:55:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:55:28,741 INFO L87 Difference]: Start difference. First operand 5421 states and 23492 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) [2022-11-20 10:55:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:29,315 INFO L93 Difference]: Finished difference Result 5588 states and 24203 transitions. [2022-11-20 10:55:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:29,317 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 [2022-11-20 10:55:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:29,333 INFO L225 Difference]: With dead ends: 5588 [2022-11-20 10:55:29,333 INFO L226 Difference]: Without dead ends: 5588 [2022-11-20 10:55:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:29,333 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 17 Unchecked, 0.5s Time] [2022-11-20 10:55:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2022-11-20 10:55:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 5450. [2022-11-20 10:55:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5441 states have (on average 4.345157140231575) internal successors, (23642), 5449 states have internal predecessors, (23642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 23642 transitions. [2022-11-20 10:55:29,477 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 23642 transitions. Word has length 13 [2022-11-20 10:55:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:29,477 INFO L495 AbstractCegarLoop]: Abstraction has 5450 states and 23642 transitions. [2022-11-20 10:55:29,477 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) [2022-11-20 10:55:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 23642 transitions. [2022-11-20 10:55:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:29,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:29,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:29,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:29,680 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1925471972, now seen corresponding path program 2 times [2022-11-20 10:55:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446839601] [2022-11-20 10:55:29,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:55:29,681 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 [2022-11-20 10:55:29,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:29,682 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:29,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-20 10:55:29,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:30,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:30,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:30,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:30,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:30,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446839601] [2022-11-20 10:55:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446839601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:30,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:30,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:55:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847019819] [2022-11-20 10:55:30,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:55:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:55:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:55:31,000 INFO L87 Difference]: Start difference. First operand 5450 states and 23642 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) [2022-11-20 10:55:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:31,947 INFO L93 Difference]: Finished difference Result 8044 states and 37547 transitions. [2022-11-20 10:55:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:31,948 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 [2022-11-20 10:55:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:31,973 INFO L225 Difference]: With dead ends: 8044 [2022-11-20 10:55:31,973 INFO L226 Difference]: Without dead ends: 8044 [2022-11-20 10:55:31,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:31,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:31,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 26 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 74 Unchecked, 0.8s Time] [2022-11-20 10:55:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8044 states. [2022-11-20 10:55:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8044 to 6448. [2022-11-20 10:55:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6448 states, 6439 states have (on average 4.517937567945333) internal successors, (29091), 6447 states have internal predecessors, (29091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 29091 transitions. [2022-11-20 10:55:32,116 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 29091 transitions. Word has length 13 [2022-11-20 10:55:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:32,116 INFO L495 AbstractCegarLoop]: Abstraction has 6448 states and 29091 transitions. [2022-11-20 10:55:32,116 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) [2022-11-20 10:55:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 29091 transitions. [2022-11-20 10:55:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:32,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:32,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:32,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-20 10:55:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:32,319 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:32,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2086660502, now seen corresponding path program 3 times [2022-11-20 10:55:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469660317] [2022-11-20 10:55:32,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:55:32,320 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 [2022-11-20 10:55:32,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:32,321 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:32,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 10:55:32,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:55:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:32,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:32,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:32,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:32,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:33,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:33,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469660317] [2022-11-20 10:55:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469660317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:33,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:33,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:55:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436212004] [2022-11-20 10:55:33,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:33,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:55:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:55:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:55:33,690 INFO L87 Difference]: Start difference. First operand 6448 states and 29091 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) [2022-11-20 10:55:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:34,290 INFO L93 Difference]: Finished difference Result 6818 states and 30798 transitions. [2022-11-20 10:55:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:34,292 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 [2022-11-20 10:55:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:34,312 INFO L225 Difference]: With dead ends: 6818 [2022-11-20 10:55:34,312 INFO L226 Difference]: Without dead ends: 6818 [2022-11-20 10:55:34,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:34,313 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:34,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-11-20 10:55:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6818 states. [2022-11-20 10:55:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6818 to 6448. [2022-11-20 10:55:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6448 states, 6439 states have (on average 4.517937567945333) internal successors, (29091), 6447 states have internal predecessors, (29091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6448 states to 6448 states and 29091 transitions. [2022-11-20 10:55:34,439 INFO L78 Accepts]: Start accepts. Automaton has 6448 states and 29091 transitions. Word has length 13 [2022-11-20 10:55:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:34,440 INFO L495 AbstractCegarLoop]: Abstraction has 6448 states and 29091 transitions. [2022-11-20 10:55:34,440 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) [2022-11-20 10:55:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6448 states and 29091 transitions. [2022-11-20 10:55:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:34,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:34,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:34,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:34,643 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -496662684, now seen corresponding path program 4 times [2022-11-20 10:55:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149873840] [2022-11-20 10:55:34,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:34,643 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 [2022-11-20 10:55:34,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:34,644 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:34,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-20 10:55:34,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:34,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:55:34,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:35,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:35,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:35,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:36,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:36,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149873840] [2022-11-20 10:55:36,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149873840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:36,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:36,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:55:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038367109] [2022-11-20 10:55:36,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:55:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:55:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:55:36,258 INFO L87 Difference]: Start difference. First operand 6448 states and 29091 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:36,892 INFO L93 Difference]: Finished difference Result 7071 states and 31801 transitions. [2022-11-20 10:55:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:55:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:55:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:36,914 INFO L225 Difference]: With dead ends: 7071 [2022-11-20 10:55:36,915 INFO L226 Difference]: Without dead ends: 7071 [2022-11-20 10:55:36,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:36,915 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:36,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-20 10:55:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7071 states. [2022-11-20 10:55:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7071 to 6708. [2022-11-20 10:55:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6708 states, 6699 states have (on average 4.531422600388118) internal successors, (30356), 6707 states have internal predecessors, (30356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6708 states to 6708 states and 30356 transitions. [2022-11-20 10:55:37,052 INFO L78 Accepts]: Start accepts. Automaton has 6708 states and 30356 transitions. Word has length 13 [2022-11-20 10:55:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:37,052 INFO L495 AbstractCegarLoop]: Abstraction has 6708 states and 30356 transitions. [2022-11-20 10:55:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6708 states and 30356 transitions. [2022-11-20 10:55:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:37,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:37,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:37,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:37,255 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash -498916074, now seen corresponding path program 5 times [2022-11-20 10:55:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:37,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74054809] [2022-11-20 10:55:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:55:37,256 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 [2022-11-20 10:55:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:37,257 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:37,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-20 10:55:37,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:55:37,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:37,717 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:37,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:38,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:39,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74054809] [2022-11-20 10:55:39,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74054809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:39,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:39,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:55:39,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737427346] [2022-11-20 10:55:39,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:55:39,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:55:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:55:39,075 INFO L87 Difference]: Start difference. First operand 6708 states and 30356 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:55:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:40,075 INFO L93 Difference]: Finished difference Result 7091 states and 31968 transitions. [2022-11-20 10:55:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:55:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-20 10:55:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:40,096 INFO L225 Difference]: With dead ends: 7091 [2022-11-20 10:55:40,096 INFO L226 Difference]: Without dead ends: 7091 [2022-11-20 10:55:40,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:55:40,097 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:40,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 50 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 91 Unchecked, 0.6s Time] [2022-11-20 10:55:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7091 states. [2022-11-20 10:55:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7091 to 6844. [2022-11-20 10:55:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6844 states, 6835 states have (on average 4.540892465252377) internal successors, (31037), 6843 states have internal predecessors, (31037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 31037 transitions. [2022-11-20 10:55:40,229 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 31037 transitions. Word has length 13 [2022-11-20 10:55:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:40,229 INFO L495 AbstractCegarLoop]: Abstraction has 6844 states and 31037 transitions. [2022-11-20 10:55:40,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:55:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 31037 transitions. [2022-11-20 10:55:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:40,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:40,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:40,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:40,432 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -492730272, now seen corresponding path program 4 times [2022-11-20 10:55:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:40,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597569076] [2022-11-20 10:55:40,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:40,433 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 [2022-11-20 10:55:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:40,434 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:40,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-20 10:55:40,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:55:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:40,859 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:40,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:41,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:41,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:41,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597569076] [2022-11-20 10:55:41,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597569076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:41,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:55:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307135641] [2022-11-20 10:55:41,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:55:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:55:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:55:41,943 INFO L87 Difference]: Start difference. First operand 6844 states and 31037 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:42,723 INFO L93 Difference]: Finished difference Result 7057 states and 31860 transitions. [2022-11-20 10:55:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:55:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:55:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:42,747 INFO L225 Difference]: With dead ends: 7057 [2022-11-20 10:55:42,747 INFO L226 Difference]: Without dead ends: 7057 [2022-11-20 10:55:42,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:42,747 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:42,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 32 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 12 Unchecked, 0.7s Time] [2022-11-20 10:55:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2022-11-20 10:55:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6847. [2022-11-20 10:55:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 6838 states have (on average 4.540655162328166) internal successors, (31049), 6846 states have internal predecessors, (31049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 31049 transitions. [2022-11-20 10:55:42,935 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 31049 transitions. Word has length 13 [2022-11-20 10:55:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:42,935 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 31049 transitions. [2022-11-20 10:55:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 31049 transitions. [2022-11-20 10:55:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:42,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:42,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:42,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:43,138 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash -494299182, now seen corresponding path program 5 times [2022-11-20 10:55:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627051790] [2022-11-20 10:55:43,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:55:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:43,141 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:43,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-20 10:55:43,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:55:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:43,580 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:43,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:44,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:44,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627051790] [2022-11-20 10:55:44,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627051790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:44,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:44,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:55:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045060872] [2022-11-20 10:55:44,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:44,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:55:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:55:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:55:44,903 INFO L87 Difference]: Start difference. First operand 6847 states and 31049 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:55:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:45,980 INFO L93 Difference]: Finished difference Result 7068 states and 31860 transitions. [2022-11-20 10:55:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:55:45,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-20 10:55:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:46,003 INFO L225 Difference]: With dead ends: 7068 [2022-11-20 10:55:46,003 INFO L226 Difference]: Without dead ends: 7068 [2022-11-20 10:55:46,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:55:46,003 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:46,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-20 10:55:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2022-11-20 10:55:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 6943. [2022-11-20 10:55:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6943 states, 6934 states have (on average 4.5432650706662825) internal successors, (31503), 6942 states have internal predecessors, (31503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6943 states to 6943 states and 31503 transitions. [2022-11-20 10:55:46,196 INFO L78 Accepts]: Start accepts. Automaton has 6943 states and 31503 transitions. Word has length 13 [2022-11-20 10:55:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:46,196 INFO L495 AbstractCegarLoop]: Abstraction has 6943 states and 31503 transitions. [2022-11-20 10:55:46,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:55:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6943 states and 31503 transitions. [2022-11-20 10:55:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:46,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:46,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:46,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:46,399 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash -494298624, now seen corresponding path program 6 times [2022-11-20 10:55:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789581326] [2022-11-20 10:55:46,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:55:46,400 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 [2022-11-20 10:55:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:46,401 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:46,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-20 10:55:46,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:55:46,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:46,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:46,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:47,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:47,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:47,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789581326] [2022-11-20 10:55:47,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789581326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:47,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:47,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:55:47,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975339430] [2022-11-20 10:55:47,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:47,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:55:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:55:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:55:47,737 INFO L87 Difference]: Start difference. First operand 6943 states and 31503 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) [2022-11-20 10:55:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:48,604 INFO L93 Difference]: Finished difference Result 10039 states and 47415 transitions. [2022-11-20 10:55:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:55:48,606 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 [2022-11-20 10:55:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:48,643 INFO L225 Difference]: With dead ends: 10039 [2022-11-20 10:55:48,644 INFO L226 Difference]: Without dead ends: 10039 [2022-11-20 10:55:48,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:48,644 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:48,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 104 Unchecked, 0.7s Time] [2022-11-20 10:55:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10039 states. [2022-11-20 10:55:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10039 to 8205. [2022-11-20 10:55:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8205 states, 8196 states have (on average 4.690336749633968) internal successors, (38442), 8204 states have internal predecessors, (38442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8205 states to 8205 states and 38442 transitions. [2022-11-20 10:55:48,898 INFO L78 Accepts]: Start accepts. Automaton has 8205 states and 38442 transitions. Word has length 13 [2022-11-20 10:55:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:48,899 INFO L495 AbstractCegarLoop]: Abstraction has 8205 states and 38442 transitions. [2022-11-20 10:55:48,899 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) [2022-11-20 10:55:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8205 states and 38442 transitions. [2022-11-20 10:55:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:48,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:48,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:48,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:49,102 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -494298469, now seen corresponding path program 4 times [2022-11-20 10:55:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:49,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183694851] [2022-11-20 10:55:49,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:55:49,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:49,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:49,103 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:49,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-20 10:55:49,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:55:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:49,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:55:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:49,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:49,611 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 35 treesize of output 31 [2022-11-20 10:55:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:50,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:50,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183694851] [2022-11-20 10:55:50,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183694851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:50,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:50,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:55:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017200898] [2022-11-20 10:55:50,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:55:50,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:50,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:55:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:55:50,319 INFO L87 Difference]: Start difference. First operand 8205 states and 38442 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:55:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:56,750 INFO L93 Difference]: Finished difference Result 18174 states and 78269 transitions. [2022-11-20 10:55:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:55:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 [2022-11-20 10:55:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:56,819 INFO L225 Difference]: With dead ends: 18174 [2022-11-20 10:55:56,819 INFO L226 Difference]: Without dead ends: 18174 [2022-11-20 10:55:56,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:55:56,819 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 533 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:56,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 68 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 10:55:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18174 states. [2022-11-20 10:55:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18174 to 9936. [2022-11-20 10:55:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9927 states have (on average 4.774856452100332) internal successors, (47400), 9935 states have internal predecessors, (47400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 47400 transitions. [2022-11-20 10:55:57,234 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 47400 transitions. Word has length 13 [2022-11-20 10:55:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:57,234 INFO L495 AbstractCegarLoop]: Abstraction has 9936 states and 47400 transitions. [2022-11-20 10:55:57,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:55:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 47400 transitions. [2022-11-20 10:55:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:55:57,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:57,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:57,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:57,438 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:55:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:57,438 INFO L85 PathProgramCache]: Analyzing trace with hash -564158364, now seen corresponding path program 7 times [2022-11-20 10:55:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:57,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859398250] [2022-11-20 10:55:57,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:55:57,439 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 [2022-11-20 10:55:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:57,440 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:55:57,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-20 10:55:57,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:55:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:57,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:55:57,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:55:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:58,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:55:58,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:58,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859398250] [2022-11-20 10:55:58,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859398250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:58,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:58,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:55:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718366833] [2022-11-20 10:55:58,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:58,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:55:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:55:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:55:58,947 INFO L87 Difference]: Start difference. First operand 9936 states and 47400 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:55:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:59,799 INFO L93 Difference]: Finished difference Result 12380 states and 60134 transitions. [2022-11-20 10:55:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:55:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:55:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:59,974 INFO L225 Difference]: With dead ends: 12380 [2022-11-20 10:55:59,974 INFO L226 Difference]: Without dead ends: 12380 [2022-11-20 10:55:59,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:59,975 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 40 Unchecked, 0.7s Time] [2022-11-20 10:55:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12380 states. [2022-11-20 10:56:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12380 to 10748. [2022-11-20 10:56:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10748 states, 10739 states have (on average 4.823819722506751) internal successors, (51803), 10747 states have internal predecessors, (51803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10748 states to 10748 states and 51803 transitions. [2022-11-20 10:56:00,211 INFO L78 Accepts]: Start accepts. Automaton has 10748 states and 51803 transitions. Word has length 13 [2022-11-20 10:56:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:00,211 INFO L495 AbstractCegarLoop]: Abstraction has 10748 states and 51803 transitions. [2022-11-20 10:56:00,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 10748 states and 51803 transitions. [2022-11-20 10:56:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:00,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:00,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:00,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:00,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:00,415 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:00,415 INFO L85 PathProgramCache]: Analyzing trace with hash -564154272, now seen corresponding path program 6 times [2022-11-20 10:56:00,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:00,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267282303] [2022-11-20 10:56:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:56:00,416 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 [2022-11-20 10:56:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:00,417 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:00,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-20 10:56:00,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:56:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:00,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:00,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:56:01,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:56:01,884 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267282303] [2022-11-20 10:56:01,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267282303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:01,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:01,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126819275] [2022-11-20 10:56:01,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:01,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:01,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:01,885 INFO L87 Difference]: Start difference. First operand 10748 states and 51803 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) [2022-11-20 10:56:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:02,574 INFO L93 Difference]: Finished difference Result 10809 states and 52017 transitions. [2022-11-20 10:56:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:02,576 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 [2022-11-20 10:56:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:02,616 INFO L225 Difference]: With dead ends: 10809 [2022-11-20 10:56:02,616 INFO L226 Difference]: Without dead ends: 10809 [2022-11-20 10:56:02,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:02,617 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:02,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 11 Unchecked, 0.5s Time] [2022-11-20 10:56:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2022-11-20 10:56:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10717. [2022-11-20 10:56:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10717 states, 10708 states have (on average 4.823029510646246) internal successors, (51645), 10716 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 51645 transitions. [2022-11-20 10:56:02,919 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 51645 transitions. Word has length 13 [2022-11-20 10:56:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:02,919 INFO L495 AbstractCegarLoop]: Abstraction has 10717 states and 51645 transitions. [2022-11-20 10:56:02,919 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) [2022-11-20 10:56:02,919 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 51645 transitions. [2022-11-20 10:56:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:02,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:02,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:02,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:03,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:03,128 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash 139972160, now seen corresponding path program 8 times [2022-11-20 10:56:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966094360] [2022-11-20 10:56:03,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:03,129 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 [2022-11-20 10:56:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:03,130 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:03,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 10:56:03,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:03,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:03,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:03,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:03,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:04,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966094360] [2022-11-20 10:56:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966094360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:04,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:04,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:04,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981864399] [2022-11-20 10:56:04,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:04,465 INFO L87 Difference]: Start difference. First operand 10717 states and 51645 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) [2022-11-20 10:56:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:05,229 INFO L93 Difference]: Finished difference Result 11183 states and 53772 transitions. [2022-11-20 10:56:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:05,231 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 [2022-11-20 10:56:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:05,276 INFO L225 Difference]: With dead ends: 11183 [2022-11-20 10:56:05,276 INFO L226 Difference]: Without dead ends: 11183 [2022-11-20 10:56:05,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:05,276 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:05,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 29 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-20 10:56:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11183 states. [2022-11-20 10:56:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11183 to 10887. [2022-11-20 10:56:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10887 states, 10878 states have (on average 4.825519396947969) internal successors, (52492), 10886 states have internal predecessors, (52492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10887 states to 10887 states and 52492 transitions. [2022-11-20 10:56:05,519 INFO L78 Accepts]: Start accepts. Automaton has 10887 states and 52492 transitions. Word has length 13 [2022-11-20 10:56:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:05,519 INFO L495 AbstractCegarLoop]: Abstraction has 10887 states and 52492 transitions. [2022-11-20 10:56:05,519 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) [2022-11-20 10:56:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10887 states and 52492 transitions. [2022-11-20 10:56:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:05,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:05,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:05,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-20 10:56:05,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:05,723 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash 137718770, now seen corresponding path program 9 times [2022-11-20 10:56:05,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:05,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085000390] [2022-11-20 10:56:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:56:05,724 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 [2022-11-20 10:56:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:05,725 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-20 10:56:06,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:56:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:06,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:06,351 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:06,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:06,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:07,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085000390] [2022-11-20 10:56:07,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085000390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:07,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:07,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476169478] [2022-11-20 10:56:07,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:07,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:07,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:07,265 INFO L87 Difference]: Start difference. First operand 10887 states and 52492 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) [2022-11-20 10:56:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:07,930 INFO L93 Difference]: Finished difference Result 11129 states and 53578 transitions. [2022-11-20 10:56:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:07,932 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 [2022-11-20 10:56:07,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:07,973 INFO L225 Difference]: With dead ends: 11129 [2022-11-20 10:56:07,974 INFO L226 Difference]: Without dead ends: 11129 [2022-11-20 10:56:07,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:07,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:07,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-20 10:56:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2022-11-20 10:56:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 10973. [2022-11-20 10:56:08,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10973 states, 10964 states have (on average 4.824516599781102) internal successors, (52896), 10972 states have internal predecessors, (52896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10973 states to 10973 states and 52896 transitions. [2022-11-20 10:56:08,425 INFO L78 Accepts]: Start accepts. Automaton has 10973 states and 52896 transitions. Word has length 13 [2022-11-20 10:56:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:08,425 INFO L495 AbstractCegarLoop]: Abstraction has 10973 states and 52896 transitions. [2022-11-20 10:56:08,425 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) [2022-11-20 10:56:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10973 states and 52896 transitions. [2022-11-20 10:56:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:08,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:08,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:08,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:08,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:08,630 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash 280864525, now seen corresponding path program 5 times [2022-11-20 10:56:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:08,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446054130] [2022-11-20 10:56:08,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:56:08,632 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 [2022-11-20 10:56:08,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:08,633 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:08,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-20 10:56:08,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:56:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:09,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:09,200 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 35 treesize of output 31 [2022-11-20 10:56:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:09,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:09,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446054130] [2022-11-20 10:56:09,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446054130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:09,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:09,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:56:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760142290] [2022-11-20 10:56:09,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:09,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:56:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:56:09,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:56:09,848 INFO L87 Difference]: Start difference. First operand 10973 states and 52896 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:17,505 INFO L93 Difference]: Finished difference Result 20334 states and 86031 transitions. [2022-11-20 10:56:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:56:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 [2022-11-20 10:56:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:17,583 INFO L225 Difference]: With dead ends: 20334 [2022-11-20 10:56:17,583 INFO L226 Difference]: Without dead ends: 20334 [2022-11-20 10:56:17,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 10:56:17,584 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 800 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:17,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 96 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-20 10:56:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20334 states. [2022-11-20 10:56:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20334 to 10803. [2022-11-20 10:56:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 10794 states have (on average 4.8135075041689825) internal successors, (51957), 10802 states have internal predecessors, (51957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 51957 transitions. [2022-11-20 10:56:18,056 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 51957 transitions. Word has length 13 [2022-11-20 10:56:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:18,057 INFO L495 AbstractCegarLoop]: Abstraction has 10803 states and 51957 transitions. [2022-11-20 10:56:18,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 51957 transitions. [2022-11-20 10:56:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:18,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:18,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:18,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:18,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:18,260 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:18,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:18,260 INFO L85 PathProgramCache]: Analyzing trace with hash 280898005, now seen corresponding path program 6 times [2022-11-20 10:56:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:18,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419273606] [2022-11-20 10:56:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:56:18,261 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 [2022-11-20 10:56:18,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:18,266 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:18,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-20 10:56:18,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:56:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:56:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:18,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:18,888 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 36 treesize of output 32 [2022-11-20 10:56:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:19,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:19,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419273606] [2022-11-20 10:56:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419273606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:19,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:19,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:56:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486601666] [2022-11-20 10:56:19,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:19,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:56:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:56:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:56:19,370 INFO L87 Difference]: Start difference. First operand 10803 states and 51957 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:26,929 INFO L93 Difference]: Finished difference Result 20706 states and 90600 transitions. [2022-11-20 10:56:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:56:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 [2022-11-20 10:56:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:27,020 INFO L225 Difference]: With dead ends: 20706 [2022-11-20 10:56:27,020 INFO L226 Difference]: Without dead ends: 20706 [2022-11-20 10:56:27,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=446, Invalid=1446, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:56:27,020 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 621 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 100 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-20 10:56:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20706 states. [2022-11-20 10:56:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20706 to 11945. [2022-11-20 10:56:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11945 states, 11936 states have (on average 4.826658847184986) internal successors, (57611), 11944 states have internal predecessors, (57611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 57611 transitions. [2022-11-20 10:56:27,481 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 57611 transitions. Word has length 13 [2022-11-20 10:56:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:27,482 INFO L495 AbstractCegarLoop]: Abstraction has 11945 states and 57611 transitions. [2022-11-20 10:56:27,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 57611 transitions. [2022-11-20 10:56:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:27,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:27,486 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:27,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Ended with exit code 0 [2022-11-20 10:56:27,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:27,688 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1587878393, now seen corresponding path program 7 times [2022-11-20 10:56:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573538721] [2022-11-20 10:56:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:56:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:27,691 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:27,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-20 10:56:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:56:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:28,316 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 35 treesize of output 31 [2022-11-20 10:56:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:29,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:29,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573538721] [2022-11-20 10:56:29,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573538721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:29,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:29,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:56:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964246531] [2022-11-20 10:56:29,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:56:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:56:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:56:29,031 INFO L87 Difference]: Start difference. First operand 11945 states and 57611 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:33,945 INFO L93 Difference]: Finished difference Result 22547 states and 99819 transitions. [2022-11-20 10:56:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:56:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 [2022-11-20 10:56:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:34,029 INFO L225 Difference]: With dead ends: 22547 [2022-11-20 10:56:34,029 INFO L226 Difference]: Without dead ends: 22547 [2022-11-20 10:56:34,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:56:34,030 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 550 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:34,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 60 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 10:56:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22547 states. [2022-11-20 10:56:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22547 to 11395. [2022-11-20 10:56:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11395 states, 11386 states have (on average 4.793254874407166) internal successors, (54576), 11394 states have internal predecessors, (54576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11395 states to 11395 states and 54576 transitions. [2022-11-20 10:56:34,505 INFO L78 Accepts]: Start accepts. Automaton has 11395 states and 54576 transitions. Word has length 13 [2022-11-20 10:56:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:34,505 INFO L495 AbstractCegarLoop]: Abstraction has 11395 states and 54576 transitions. [2022-11-20 10:56:34,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-11-20 10:56:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 11395 states and 54576 transitions. [2022-11-20 10:56:34,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:34,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:34,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:34,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Ended with exit code 0 [2022-11-20 10:56:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:34,710 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553885, now seen corresponding path program 4 times [2022-11-20 10:56:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:34,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255380740] [2022-11-20 10:56:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:56:34,712 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 [2022-11-20 10:56:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:34,713 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-20 10:56:35,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:56:35,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:56:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:35,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:35,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:36,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255380740] [2022-11-20 10:56:36,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255380740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:36,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:36,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-11-20 10:56:36,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139497694] [2022-11-20 10:56:36,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:36,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:56:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:56:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:56:36,482 INFO L87 Difference]: Start difference. First operand 11395 states and 54576 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-20 10:56:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:40,338 INFO L93 Difference]: Finished difference Result 11860 states and 56083 transitions. [2022-11-20 10:56:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:56:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 [2022-11-20 10:56:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:40,382 INFO L225 Difference]: With dead ends: 11860 [2022-11-20 10:56:40,382 INFO L226 Difference]: Without dead ends: 11860 [2022-11-20 10:56:40,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:56:40,382 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:40,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 124 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 544 Invalid, 0 Unknown, 198 Unchecked, 3.3s Time] [2022-11-20 10:56:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11860 states. [2022-11-20 10:56:40,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11860 to 11499. [2022-11-20 10:56:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11499 states, 11490 states have (on average 4.782767624020888) internal successors, (54954), 11498 states have internal predecessors, (54954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11499 states to 11499 states and 54954 transitions. [2022-11-20 10:56:40,638 INFO L78 Accepts]: Start accepts. Automaton has 11499 states and 54954 transitions. Word has length 13 [2022-11-20 10:56:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:40,639 INFO L495 AbstractCegarLoop]: Abstraction has 11499 states and 54954 transitions. [2022-11-20 10:56:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-20 10:56:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11499 states and 54954 transitions. [2022-11-20 10:56:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:40,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:40,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:40,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:40,843 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1483785718, now seen corresponding path program 1 times [2022-11-20 10:56:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948734814] [2022-11-20 10:56:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:40,844 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 [2022-11-20 10:56:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:40,845 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-20 10:56:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:56:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:41,292 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:41,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:42,434 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948734814] [2022-11-20 10:56:42,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948734814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:42,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:42,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:56:42,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750588567] [2022-11-20 10:56:42,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:42,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:56:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:56:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:56:42,436 INFO L87 Difference]: Start difference. First operand 11499 states and 54954 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:43,013 INFO L93 Difference]: Finished difference Result 11652 states and 55720 transitions. [2022-11-20 10:56:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:56:43,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:56:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:43,066 INFO L225 Difference]: With dead ends: 11652 [2022-11-20 10:56:43,066 INFO L226 Difference]: Without dead ends: 11652 [2022-11-20 10:56:43,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:56:43,067 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:43,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 10:56:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11652 states. [2022-11-20 10:56:43,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11652 to 11544. [2022-11-20 10:56:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11544 states, 11535 states have (on average 4.785955786736021) internal successors, (55206), 11543 states have internal predecessors, (55206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11544 states to 11544 states and 55206 transitions. [2022-11-20 10:56:43,425 INFO L78 Accepts]: Start accepts. Automaton has 11544 states and 55206 transitions. Word has length 13 [2022-11-20 10:56:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:43,426 INFO L495 AbstractCegarLoop]: Abstraction has 11544 states and 55206 transitions. [2022-11-20 10:56:43,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11544 states and 55206 transitions. [2022-11-20 10:56:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:43,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:43,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:43,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:43,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:43,630 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1379427845, now seen corresponding path program 1 times [2022-11-20 10:56:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:43,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853914521] [2022-11-20 10:56:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:43,631 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 [2022-11-20 10:56:43,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:43,632 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:43,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 10:56:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:56:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:44,143 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:44,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:45,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:45,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853914521] [2022-11-20 10:56:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853914521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:45,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:45,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:56:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938580011] [2022-11-20 10:56:45,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:56:45,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:45,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:56:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:56:45,196 INFO L87 Difference]: Start difference. First operand 11544 states and 55206 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:45,902 INFO L93 Difference]: Finished difference Result 11685 states and 55773 transitions. [2022-11-20 10:56:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:56:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:56:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:45,945 INFO L225 Difference]: With dead ends: 11685 [2022-11-20 10:56:45,946 INFO L226 Difference]: Without dead ends: 11685 [2022-11-20 10:56:45,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:56:45,946 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:45,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 64 Unchecked, 0.6s Time] [2022-11-20 10:56:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2022-11-20 10:56:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11589. [2022-11-20 10:56:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11589 states, 11580 states have (on average 4.781347150259068) internal successors, (55368), 11588 states have internal predecessors, (55368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11589 states to 11589 states and 55368 transitions. [2022-11-20 10:56:46,210 INFO L78 Accepts]: Start accepts. Automaton has 11589 states and 55368 transitions. Word has length 13 [2022-11-20 10:56:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:46,210 INFO L495 AbstractCegarLoop]: Abstraction has 11589 states and 55368 transitions. [2022-11-20 10:56:46,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11589 states and 55368 transitions. [2022-11-20 10:56:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:46,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:46,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:46,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-20 10:56:46,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:46,415 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1495404208, now seen corresponding path program 2 times [2022-11-20 10:56:46,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256675415] [2022-11-20 10:56:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:46,416 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 [2022-11-20 10:56:46,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:46,417 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:46,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 10:56:46,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:46,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:46,941 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:46,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:47,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:47,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:47,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256675415] [2022-11-20 10:56:47,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256675415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:47,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:47,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:47,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928198278] [2022-11-20 10:56:47,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:47,820 INFO L87 Difference]: Start difference. First operand 11589 states and 55368 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) [2022-11-20 10:56:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:48,552 INFO L93 Difference]: Finished difference Result 11974 states and 57222 transitions. [2022-11-20 10:56:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:48,553 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 [2022-11-20 10:56:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:48,596 INFO L225 Difference]: With dead ends: 11974 [2022-11-20 10:56:48,596 INFO L226 Difference]: Without dead ends: 11974 [2022-11-20 10:56:48,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:48,596 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:48,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 96 Unchecked, 0.6s Time] [2022-11-20 10:56:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2022-11-20 10:56:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 11895. [2022-11-20 10:56:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11895 states, 11886 states have (on average 4.78899545683998) internal successors, (56922), 11894 states have internal predecessors, (56922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11895 states to 11895 states and 56922 transitions. [2022-11-20 10:56:48,859 INFO L78 Accepts]: Start accepts. Automaton has 11895 states and 56922 transitions. Word has length 13 [2022-11-20 10:56:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:48,859 INFO L495 AbstractCegarLoop]: Abstraction has 11895 states and 56922 transitions. [2022-11-20 10:56:48,859 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) [2022-11-20 10:56:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11895 states and 56922 transitions. [2022-11-20 10:56:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:48,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:48,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:48,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:49,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:49,063 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1492037825, now seen corresponding path program 2 times [2022-11-20 10:56:49,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:49,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251084012] [2022-11-20 10:56:49,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:56:49,064 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 [2022-11-20 10:56:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:49,065 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:49,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-20 10:56:49,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:49,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:49,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:49,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:49,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:50,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:50,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251084012] [2022-11-20 10:56:50,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251084012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:50,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:50,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:50,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571988270] [2022-11-20 10:56:50,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:50,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:50,477 INFO L87 Difference]: Start difference. First operand 11895 states and 56922 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) [2022-11-20 10:56:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:51,103 INFO L93 Difference]: Finished difference Result 11988 states and 57279 transitions. [2022-11-20 10:56:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:51,105 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 [2022-11-20 10:56:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:51,147 INFO L225 Difference]: With dead ends: 11988 [2022-11-20 10:56:51,147 INFO L226 Difference]: Without dead ends: 11988 [2022-11-20 10:56:51,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:51,148 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:51,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-11-20 10:56:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2022-11-20 10:56:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 11904. [2022-11-20 10:56:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11895 states have (on average 4.789155107187894) internal successors, (56967), 11903 states have internal predecessors, (56967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 56967 transitions. [2022-11-20 10:56:51,413 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 56967 transitions. Word has length 13 [2022-11-20 10:56:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:51,413 INFO L495 AbstractCegarLoop]: Abstraction has 11904 states and 56967 transitions. [2022-11-20 10:56:51,413 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) [2022-11-20 10:56:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 56967 transitions. [2022-11-20 10:56:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:51,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:51,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:51,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-20 10:56:51,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:51,617 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1492598398, now seen corresponding path program 3 times [2022-11-20 10:56:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617799380] [2022-11-20 10:56:51,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:56:51,618 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 [2022-11-20 10:56:51,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:51,619 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:51,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-20 10:56:51,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:56:51,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:51,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:52,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:52,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:52,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:52,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617799380] [2022-11-20 10:56:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617799380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:52,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:52,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818436663] [2022-11-20 10:56:52,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:52,969 INFO L87 Difference]: Start difference. First operand 11904 states and 56967 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) [2022-11-20 10:56:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:53,651 INFO L93 Difference]: Finished difference Result 12072 states and 57751 transitions. [2022-11-20 10:56:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:53,653 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 [2022-11-20 10:56:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:53,698 INFO L225 Difference]: With dead ends: 12072 [2022-11-20 10:56:53,698 INFO L226 Difference]: Without dead ends: 12072 [2022-11-20 10:56:53,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:53,699 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:53,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-20 10:56:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12072 states. [2022-11-20 10:56:53,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12072 to 11870. [2022-11-20 10:56:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11870 states, 11861 states have (on average 4.7835764269454515) internal successors, (56738), 11869 states have internal predecessors, (56738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11870 states to 11870 states and 56738 transitions. [2022-11-20 10:56:53,966 INFO L78 Accepts]: Start accepts. Automaton has 11870 states and 56738 transitions. Word has length 13 [2022-11-20 10:56:53,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 11870 states and 56738 transitions. [2022-11-20 10:56:53,966 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) [2022-11-20 10:56:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11870 states and 56738 transitions. [2022-11-20 10:56:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:53,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:53,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:53,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-20 10:56:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:54,171 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1492594895, now seen corresponding path program 3 times [2022-11-20 10:56:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489964615] [2022-11-20 10:56:54,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:56:54,172 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 [2022-11-20 10:56:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:54,172 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:54,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 10:56:54,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:56:54,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:54,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:56:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:54,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:54,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:54,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:55,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:55,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489964615] [2022-11-20 10:56:55,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489964615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:55,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:55,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:56:55,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759118186] [2022-11-20 10:56:55,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:55,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:56:55,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:55,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:56:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:56:55,503 INFO L87 Difference]: Start difference. First operand 11870 states and 56738 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) [2022-11-20 10:56:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:56,096 INFO L93 Difference]: Finished difference Result 11936 states and 56978 transitions. [2022-11-20 10:56:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:56:56,098 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 [2022-11-20 10:56:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:56,138 INFO L225 Difference]: With dead ends: 11936 [2022-11-20 10:56:56,138 INFO L226 Difference]: Without dead ends: 11936 [2022-11-20 10:56:56,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:56:56,139 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:56,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2022-11-20 10:56:56,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11936 states. [2022-11-20 10:56:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11936 to 11861. [2022-11-20 10:56:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11852 states have (on average 4.7834120823489705) internal successors, (56693), 11860 states have internal predecessors, (56693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 56693 transitions. [2022-11-20 10:56:56,391 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 56693 transitions. Word has length 13 [2022-11-20 10:56:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:56,391 INFO L495 AbstractCegarLoop]: Abstraction has 11861 states and 56693 transitions. [2022-11-20 10:56:56,392 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) [2022-11-20 10:56:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 56693 transitions. [2022-11-20 10:56:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:56,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:56,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:56,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-20 10:56:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:56,595 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1996099818, now seen corresponding path program 4 times [2022-11-20 10:56:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847978536] [2022-11-20 10:56:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:56:56,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:56,597 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:56,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-20 10:56:56,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:56:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:56:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:57,038 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:57,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:56:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:56:58,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:58,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847978536] [2022-11-20 10:56:58,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847978536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:58,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:58,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:56:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580431672] [2022-11-20 10:56:58,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:56:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:56:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:56:58,209 INFO L87 Difference]: Start difference. First operand 11861 states and 56693 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:58,900 INFO L93 Difference]: Finished difference Result 12545 states and 59693 transitions. [2022-11-20 10:56:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:56:58,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-20 10:56:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:58,948 INFO L225 Difference]: With dead ends: 12545 [2022-11-20 10:56:58,948 INFO L226 Difference]: Without dead ends: 12545 [2022-11-20 10:56:58,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:56:58,949 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:58,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 72 Unchecked, 0.5s Time] [2022-11-20 10:56:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12545 states. [2022-11-20 10:56:59,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12545 to 12296. [2022-11-20 10:56:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12296 states, 12287 states have (on average 4.777244241881664) internal successors, (58698), 12295 states have internal predecessors, (58698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12296 states to 12296 states and 58698 transitions. [2022-11-20 10:56:59,229 INFO L78 Accepts]: Start accepts. Automaton has 12296 states and 58698 transitions. Word has length 13 [2022-11-20 10:56:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:59,229 INFO L495 AbstractCegarLoop]: Abstraction has 12296 states and 58698 transitions. [2022-11-20 10:56:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-20 10:56:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 12296 states and 58698 transitions. [2022-11-20 10:56:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:56:59,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:59,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:59,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:59,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:59,447 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:56:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1998905628, now seen corresponding path program 5 times [2022-11-20 10:56:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:59,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796711514] [2022-11-20 10:56:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:56:59,448 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 [2022-11-20 10:56:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:59,448 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:56:59,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-20 10:56:59,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:56:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:56:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:56:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:59,894 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:56:59,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:00,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:01,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796711514] [2022-11-20 10:57:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796711514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:01,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:57:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190122421] [2022-11-20 10:57:01,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:01,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:57:01,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:57:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:57:01,217 INFO L87 Difference]: Start difference. First operand 12296 states and 58698 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:57:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:04,498 INFO L93 Difference]: Finished difference Result 21804 states and 103155 transitions. [2022-11-20 10:57:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:57:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-20 10:57:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:04,581 INFO L225 Difference]: With dead ends: 21804 [2022-11-20 10:57:04,581 INFO L226 Difference]: Without dead ends: 21804 [2022-11-20 10:57:04,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:57:04,582 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:04,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 47 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 300 Invalid, 0 Unknown, 404 Unchecked, 2.4s Time] [2022-11-20 10:57:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2022-11-20 10:57:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 13611. [2022-11-20 10:57:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13611 states, 13602 states have (on average 4.762755477135715) internal successors, (64783), 13610 states have internal predecessors, (64783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13611 states to 13611 states and 64783 transitions. [2022-11-20 10:57:04,970 INFO L78 Accepts]: Start accepts. Automaton has 13611 states and 64783 transitions. Word has length 13 [2022-11-20 10:57:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:04,970 INFO L495 AbstractCegarLoop]: Abstraction has 13611 states and 64783 transitions. [2022-11-20 10:57:04,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:57:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 13611 states and 64783 transitions. [2022-11-20 10:57:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:04,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:04,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:04,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:05,175 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash -807746834, now seen corresponding path program 1 times [2022-11-20 10:57:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:05,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537488829] [2022-11-20 10:57:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:05,176 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 [2022-11-20 10:57:05,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:05,177 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:05,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-20 10:57:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:05,586 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:05,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:05,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:05,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:05,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537488829] [2022-11-20 10:57:05,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537488829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:05,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:05,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589487009] [2022-11-20 10:57:05,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:05,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:05,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:05,873 INFO L87 Difference]: Start difference. First operand 13611 states and 64783 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:06,094 INFO L93 Difference]: Finished difference Result 13639 states and 64901 transitions. [2022-11-20 10:57:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:06,144 INFO L225 Difference]: With dead ends: 13639 [2022-11-20 10:57:06,144 INFO L226 Difference]: Without dead ends: 13639 [2022-11-20 10:57:06,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:06,145 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:06,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 10:57:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13639 states. [2022-11-20 10:57:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13639 to 13612. [2022-11-20 10:57:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13612 states, 13603 states have (on average 4.762699404543116) internal successors, (64787), 13611 states have internal predecessors, (64787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13612 states to 13612 states and 64787 transitions. [2022-11-20 10:57:06,547 INFO L78 Accepts]: Start accepts. Automaton has 13612 states and 64787 transitions. Word has length 13 [2022-11-20 10:57:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 13612 states and 64787 transitions. [2022-11-20 10:57:06,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 13612 states and 64787 transitions. [2022-11-20 10:57:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:06,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:06,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:06,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-20 10:57:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:06,751 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:06,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash -807864014, now seen corresponding path program 2 times [2022-11-20 10:57:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:06,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177441774] [2022-11-20 10:57:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:06,752 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 [2022-11-20 10:57:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:06,753 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:06,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-20 10:57:07,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:07,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:07,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:07,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:07,167 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:07,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:07,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:07,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:07,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177441774] [2022-11-20 10:57:07,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177441774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:07,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:07,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:07,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732803832] [2022-11-20 10:57:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:07,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:07,440 INFO L87 Difference]: Start difference. First operand 13612 states and 64787 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:07,667 INFO L93 Difference]: Finished difference Result 13665 states and 65004 transitions. [2022-11-20 10:57:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:07,717 INFO L225 Difference]: With dead ends: 13665 [2022-11-20 10:57:07,717 INFO L226 Difference]: Without dead ends: 13665 [2022-11-20 10:57:07,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:07,717 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:07,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 10:57:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13665 states. [2022-11-20 10:57:07,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13665 to 13615. [2022-11-20 10:57:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13615 states, 13606 states have (on average 4.7624577392326914) internal successors, (64798), 13614 states have internal predecessors, (64798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13615 states to 13615 states and 64798 transitions. [2022-11-20 10:57:08,016 INFO L78 Accepts]: Start accepts. Automaton has 13615 states and 64798 transitions. Word has length 13 [2022-11-20 10:57:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:08,016 INFO L495 AbstractCegarLoop]: Abstraction has 13615 states and 64798 transitions. [2022-11-20 10:57:08,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13615 states and 64798 transitions. [2022-11-20 10:57:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:08,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:08,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:08,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-20 10:57:08,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:08,220 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash -807862898, now seen corresponding path program 1 times [2022-11-20 10:57:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:08,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363585612] [2022-11-20 10:57:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:08,222 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:08,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-20 10:57:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:08,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:08,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:08,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:08,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363585612] [2022-11-20 10:57:08,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363585612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:08,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:08,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242764780] [2022-11-20 10:57:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:08,930 INFO L87 Difference]: Start difference. First operand 13615 states and 64798 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:09,158 INFO L93 Difference]: Finished difference Result 13631 states and 64858 transitions. [2022-11-20 10:57:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:09,207 INFO L225 Difference]: With dead ends: 13631 [2022-11-20 10:57:09,207 INFO L226 Difference]: Without dead ends: 13631 [2022-11-20 10:57:09,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:09,208 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:09,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:57:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2022-11-20 10:57:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 13616. [2022-11-20 10:57:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13616 states, 13607 states have (on average 4.762328213419563) internal successors, (64801), 13615 states have internal predecessors, (64801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13616 states to 13616 states and 64801 transitions. [2022-11-20 10:57:09,505 INFO L78 Accepts]: Start accepts. Automaton has 13616 states and 64801 transitions. Word has length 13 [2022-11-20 10:57:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:09,505 INFO L495 AbstractCegarLoop]: Abstraction has 13616 states and 64801 transitions. [2022-11-20 10:57:09,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13616 states and 64801 transitions. [2022-11-20 10:57:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:09,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:09,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:09,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-20 10:57:09,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:09,710 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash -807712238, now seen corresponding path program 2 times [2022-11-20 10:57:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027598737] [2022-11-20 10:57:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:09,710 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 [2022-11-20 10:57:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:09,711 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-20 10:57:09,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:10,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:10,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:10,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027598737] [2022-11-20 10:57:10,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027598737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:10,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655482617] [2022-11-20 10:57:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:10,409 INFO L87 Difference]: Start difference. First operand 13616 states and 64801 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:10,639 INFO L93 Difference]: Finished difference Result 13655 states and 64951 transitions. [2022-11-20 10:57:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:10,689 INFO L225 Difference]: With dead ends: 13655 [2022-11-20 10:57:10,689 INFO L226 Difference]: Without dead ends: 13655 [2022-11-20 10:57:10,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:10,690 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:10,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:57:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13655 states. [2022-11-20 10:57:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13655 to 13616. [2022-11-20 10:57:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13616 states, 13607 states have (on average 4.762328213419563) internal successors, (64801), 13615 states have internal predecessors, (64801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13616 states to 13616 states and 64801 transitions. [2022-11-20 10:57:11,185 INFO L78 Accepts]: Start accepts. Automaton has 13616 states and 64801 transitions. Word has length 13 [2022-11-20 10:57:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 13616 states and 64801 transitions. [2022-11-20 10:57:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13616 states and 64801 transitions. [2022-11-20 10:57:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:11,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:11,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:11,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:11,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:11,404 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:11,405 INFO L85 PathProgramCache]: Analyzing trace with hash -804501134, now seen corresponding path program 3 times [2022-11-20 10:57:11,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:11,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716730398] [2022-11-20 10:57:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:11,406 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 [2022-11-20 10:57:11,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:11,406 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:11,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-20 10:57:11,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:57:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:11,840 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:11,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:12,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:12,154 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716730398] [2022-11-20 10:57:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716730398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:12,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:12,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:12,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844681897] [2022-11-20 10:57:12,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:12,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:12,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:12,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:12,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:12,155 INFO L87 Difference]: Start difference. First operand 13616 states and 64801 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:12,426 INFO L93 Difference]: Finished difference Result 13659 states and 64987 transitions. [2022-11-20 10:57:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:12,488 INFO L225 Difference]: With dead ends: 13659 [2022-11-20 10:57:12,488 INFO L226 Difference]: Without dead ends: 13659 [2022-11-20 10:57:12,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:12,489 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:12,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:57:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2022-11-20 10:57:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 13617. [2022-11-20 10:57:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13617 states, 13608 states have (on average 4.762272192827749) internal successors, (64805), 13616 states have internal predecessors, (64805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13617 states to 13617 states and 64805 transitions. [2022-11-20 10:57:12,823 INFO L78 Accepts]: Start accepts. Automaton has 13617 states and 64805 transitions. Word has length 13 [2022-11-20 10:57:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:12,824 INFO L495 AbstractCegarLoop]: Abstraction has 13617 states and 64805 transitions. [2022-11-20 10:57:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13617 states and 64805 transitions. [2022-11-20 10:57:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:12,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:12,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:12,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-20 10:57:13,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:13,028 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash -804500545, now seen corresponding path program 1 times [2022-11-20 10:57:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718252252] [2022-11-20 10:57:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:13,029 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 [2022-11-20 10:57:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:13,029 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:13,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-20 10:57:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:13,443 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:13,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:13,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:13,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:13,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718252252] [2022-11-20 10:57:13,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718252252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:13,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:13,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248320863] [2022-11-20 10:57:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:13,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:13,734 INFO L87 Difference]: Start difference. First operand 13617 states and 64805 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:13,971 INFO L93 Difference]: Finished difference Result 13629 states and 64851 transitions. [2022-11-20 10:57:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:14,021 INFO L225 Difference]: With dead ends: 13629 [2022-11-20 10:57:14,021 INFO L226 Difference]: Without dead ends: 13629 [2022-11-20 10:57:14,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:14,022 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:57:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13629 states. [2022-11-20 10:57:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13629 to 13618. [2022-11-20 10:57:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.7622161804688075) internal successors, (64809), 13617 states have internal predecessors, (64809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64809 transitions. [2022-11-20 10:57:14,313 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64809 transitions. Word has length 13 [2022-11-20 10:57:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:14,314 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64809 transitions. [2022-11-20 10:57:14,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64809 transitions. [2022-11-20 10:57:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:14,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:14,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:14,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-20 10:57:14,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:14,518 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash -804470785, now seen corresponding path program 2 times [2022-11-20 10:57:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:14,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261646398] [2022-11-20 10:57:14,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:14,519 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 [2022-11-20 10:57:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:14,519 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:14,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-20 10:57:14,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:14,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:14,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:15,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:15,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261646398] [2022-11-20 10:57:15,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261646398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:15,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:15,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195074327] [2022-11-20 10:57:15,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:15,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:15,235 INFO L87 Difference]: Start difference. First operand 13618 states and 64809 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:15,468 INFO L93 Difference]: Finished difference Result 13631 states and 64857 transitions. [2022-11-20 10:57:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:15,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:15,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:15,517 INFO L225 Difference]: With dead ends: 13631 [2022-11-20 10:57:15,517 INFO L226 Difference]: Without dead ends: 13631 [2022-11-20 10:57:15,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:15,518 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 10:57:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2022-11-20 10:57:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 13618. [2022-11-20 10:57:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.7622161804688075) internal successors, (64809), 13617 states have internal predecessors, (64809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64809 transitions. [2022-11-20 10:57:15,814 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64809 transitions. Word has length 13 [2022-11-20 10:57:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:15,815 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64809 transitions. [2022-11-20 10:57:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64809 transitions. [2022-11-20 10:57:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:15,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:15,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:15,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-20 10:57:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:16,019 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash -808238804, now seen corresponding path program 4 times [2022-11-20 10:57:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066615330] [2022-11-20 10:57:16,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:57:16,019 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 [2022-11-20 10:57:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:16,020 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:16,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-20 10:57:16,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:57:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:16,442 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:16,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:16,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:16,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066615330] [2022-11-20 10:57:16,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066615330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:16,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:16,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911941029] [2022-11-20 10:57:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:16,815 INFO L87 Difference]: Start difference. First operand 13618 states and 64809 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:17,061 INFO L93 Difference]: Finished difference Result 13700 states and 65143 transitions. [2022-11-20 10:57:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:17,111 INFO L225 Difference]: With dead ends: 13700 [2022-11-20 10:57:17,111 INFO L226 Difference]: Without dead ends: 13700 [2022-11-20 10:57:17,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:17,111 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:17,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-20 10:57:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13700 states. [2022-11-20 10:57:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13700 to 13618. [2022-11-20 10:57:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.7622161804688075) internal successors, (64809), 13617 states have internal predecessors, (64809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64809 transitions. [2022-11-20 10:57:17,416 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64809 transitions. Word has length 13 [2022-11-20 10:57:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:17,416 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64809 transitions. [2022-11-20 10:57:17,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64809 transitions. [2022-11-20 10:57:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:17,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:17,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:17,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-20 10:57:17,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:17,621 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1545480872, now seen corresponding path program 5 times [2022-11-20 10:57:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808085173] [2022-11-20 10:57:17,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:57:17,621 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 [2022-11-20 10:57:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:17,622 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:17,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-20 10:57:17,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:18,041 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:18,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:18,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:18,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808085173] [2022-11-20 10:57:18,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808085173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:18,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:18,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977931349] [2022-11-20 10:57:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:18,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:18,340 INFO L87 Difference]: Start difference. First operand 13618 states and 64809 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:18,593 INFO L93 Difference]: Finished difference Result 13618 states and 64808 transitions. [2022-11-20 10:57:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:18,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:18,643 INFO L225 Difference]: With dead ends: 13618 [2022-11-20 10:57:18,643 INFO L226 Difference]: Without dead ends: 13618 [2022-11-20 10:57:18,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:18,643 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:18,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:57:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13618 states. [2022-11-20 10:57:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13618 to 13618. [2022-11-20 10:57:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.762142699684032) internal successors, (64808), 13617 states have internal predecessors, (64808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64808 transitions. [2022-11-20 10:57:18,946 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64808 transitions. Word has length 13 [2022-11-20 10:57:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:18,946 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64808 transitions. [2022-11-20 10:57:18,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64808 transitions. [2022-11-20 10:57:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:18,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:18,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:18,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:19,150 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1545481988, now seen corresponding path program 3 times [2022-11-20 10:57:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239041126] [2022-11-20 10:57:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:19,151 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 [2022-11-20 10:57:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:19,152 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:19,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-20 10:57:19,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:57:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:19,576 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:19,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:19,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:19,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:19,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239041126] [2022-11-20 10:57:19,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239041126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:19,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472529937] [2022-11-20 10:57:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:19,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:19,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:19,875 INFO L87 Difference]: Start difference. First operand 13618 states and 64808 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:20,122 INFO L93 Difference]: Finished difference Result 13623 states and 64827 transitions. [2022-11-20 10:57:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:20,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:20,171 INFO L225 Difference]: With dead ends: 13623 [2022-11-20 10:57:20,171 INFO L226 Difference]: Without dead ends: 13623 [2022-11-20 10:57:20,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:20,172 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:20,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:57:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13623 states. [2022-11-20 10:57:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13623 to 13618. [2022-11-20 10:57:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.762069218899258) internal successors, (64807), 13617 states have internal predecessors, (64807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64807 transitions. [2022-11-20 10:57:20,469 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64807 transitions. Word has length 13 [2022-11-20 10:57:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64807 transitions. [2022-11-20 10:57:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64807 transitions. [2022-11-20 10:57:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:20,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:20,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:20,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-11-20 10:57:20,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:20,673 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:20,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1545586551, now seen corresponding path program 3 times [2022-11-20 10:57:20,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:20,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045142539] [2022-11-20 10:57:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:20,674 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 [2022-11-20 10:57:20,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:20,675 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-20 10:57:20,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:57:20,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:20,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:21,105 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:21,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:21,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:21,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:21,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045142539] [2022-11-20 10:57:21,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045142539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:21,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:21,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495782327] [2022-11-20 10:57:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:21,409 INFO L87 Difference]: Start difference. First operand 13618 states and 64807 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:21,666 INFO L93 Difference]: Finished difference Result 13618 states and 64800 transitions. [2022-11-20 10:57:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:21,716 INFO L225 Difference]: With dead ends: 13618 [2022-11-20 10:57:21,716 INFO L226 Difference]: Without dead ends: 13618 [2022-11-20 10:57:21,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:21,716 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:21,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-11-20 10:57:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13618 states. [2022-11-20 10:57:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13618 to 13618. [2022-11-20 10:57:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13609 states have (on average 4.761554853405834) internal successors, (64800), 13617 states have internal predecessors, (64800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 64800 transitions. [2022-11-20 10:57:22,118 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 64800 transitions. Word has length 13 [2022-11-20 10:57:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:22,119 INFO L495 AbstractCegarLoop]: Abstraction has 13618 states and 64800 transitions. [2022-11-20 10:57:22,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 64800 transitions. [2022-11-20 10:57:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:22,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:22,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:22,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-20 10:57:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:22,323 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1002391976, now seen corresponding path program 6 times [2022-11-20 10:57:22,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:22,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887313132] [2022-11-20 10:57:22,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:57:22,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:22,325 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:22,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-20 10:57:22,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 10:57:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:22,767 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:22,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:23,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:23,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:23,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887313132] [2022-11-20 10:57:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887313132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:23,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:23,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049361030] [2022-11-20 10:57:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:23,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:23,056 INFO L87 Difference]: Start difference. First operand 13618 states and 64800 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:23,283 INFO L93 Difference]: Finished difference Result 13675 states and 65011 transitions. [2022-11-20 10:57:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:23,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:23,332 INFO L225 Difference]: With dead ends: 13675 [2022-11-20 10:57:23,333 INFO L226 Difference]: Without dead ends: 13675 [2022-11-20 10:57:23,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:23,333 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 10:57:23,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13675 states. [2022-11-20 10:57:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13675 to 13616. [2022-11-20 10:57:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13616 states, 13607 states have (on average 4.761593297567429) internal successors, (64791), 13615 states have internal predecessors, (64791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13616 states to 13616 states and 64791 transitions. [2022-11-20 10:57:23,632 INFO L78 Accepts]: Start accepts. Automaton has 13616 states and 64791 transitions. Word has length 13 [2022-11-20 10:57:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:23,632 INFO L495 AbstractCegarLoop]: Abstraction has 13616 states and 64791 transitions. [2022-11-20 10:57:23,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13616 states and 64791 transitions. [2022-11-20 10:57:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:23,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:23,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:23,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:23,836 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 998759396, now seen corresponding path program 7 times [2022-11-20 10:57:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:23,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424746782] [2022-11-20 10:57:23,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:57:23,836 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 [2022-11-20 10:57:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:23,837 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:23,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-20 10:57:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:24,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:24,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:24,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:24,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424746782] [2022-11-20 10:57:24,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424746782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:24,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:24,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939884786] [2022-11-20 10:57:24,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:24,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:24,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:24,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:24,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:24,584 INFO L87 Difference]: Start difference. First operand 13616 states and 64791 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:24,814 INFO L93 Difference]: Finished difference Result 13666 states and 64999 transitions. [2022-11-20 10:57:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:24,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:24,864 INFO L225 Difference]: With dead ends: 13666 [2022-11-20 10:57:24,864 INFO L226 Difference]: Without dead ends: 13666 [2022-11-20 10:57:24,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:24,865 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:24,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:57:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13666 states. [2022-11-20 10:57:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13666 to 13623. [2022-11-20 10:57:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13614 states have (on average 4.761128250330542) internal successors, (64818), 13622 states have internal predecessors, (64818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 64818 transitions. [2022-11-20 10:57:25,167 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 64818 transitions. Word has length 13 [2022-11-20 10:57:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:25,168 INFO L495 AbstractCegarLoop]: Abstraction has 13623 states and 64818 transitions. [2022-11-20 10:57:25,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 64818 transitions. [2022-11-20 10:57:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:25,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:25,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:25,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Ended with exit code 0 [2022-11-20 10:57:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:25,372 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 998792132, now seen corresponding path program 4 times [2022-11-20 10:57:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128773512] [2022-11-20 10:57:25,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:57:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:25,373 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:25,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-20 10:57:25,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:57:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:25,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:25,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:25,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:25,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:26,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:26,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:26,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128773512] [2022-11-20 10:57:26,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128773512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:26,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:26,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:26,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300429945] [2022-11-20 10:57:26,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:26,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:26,104 INFO L87 Difference]: Start difference. First operand 13623 states and 64818 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:26,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:26,331 INFO L93 Difference]: Finished difference Result 13639 states and 64876 transitions. [2022-11-20 10:57:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:26,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:26,381 INFO L225 Difference]: With dead ends: 13639 [2022-11-20 10:57:26,381 INFO L226 Difference]: Without dead ends: 13639 [2022-11-20 10:57:26,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:26,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:26,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 10:57:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13639 states. [2022-11-20 10:57:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13639 to 13626. [2022-11-20 10:57:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13626 states, 13617 states have (on average 4.761034001615627) internal successors, (64831), 13625 states have internal predecessors, (64831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 64831 transitions. [2022-11-20 10:57:26,681 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 64831 transitions. Word has length 13 [2022-11-20 10:57:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 13626 states and 64831 transitions. [2022-11-20 10:57:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 64831 transitions. [2022-11-20 10:57:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:26,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:26,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:26,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-20 10:57:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:26,886 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1003464452, now seen corresponding path program 5 times [2022-11-20 10:57:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:26,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499331748] [2022-11-20 10:57:26,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:57:26,886 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 [2022-11-20 10:57:26,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:26,887 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:26,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-20 10:57:27,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:27,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:27,312 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:27,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:27,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:27,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:27,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499331748] [2022-11-20 10:57:27,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499331748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:27,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:27,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:27,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038134917] [2022-11-20 10:57:27,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:27,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:27,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:27,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:27,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:27,674 INFO L87 Difference]: Start difference. First operand 13626 states and 64831 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:27,902 INFO L93 Difference]: Finished difference Result 13671 states and 64996 transitions. [2022-11-20 10:57:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:27,952 INFO L225 Difference]: With dead ends: 13671 [2022-11-20 10:57:27,952 INFO L226 Difference]: Without dead ends: 13671 [2022-11-20 10:57:27,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:27,952 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:27,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:57:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13671 states. [2022-11-20 10:57:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13671 to 13626. [2022-11-20 10:57:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13626 states, 13617 states have (on average 4.761034001615627) internal successors, (64831), 13625 states have internal predecessors, (64831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13626 states to 13626 states and 64831 transitions. [2022-11-20 10:57:28,255 INFO L78 Accepts]: Start accepts. Automaton has 13626 states and 64831 transitions. Word has length 13 [2022-11-20 10:57:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:28,255 INFO L495 AbstractCegarLoop]: Abstraction has 13626 states and 64831 transitions. [2022-11-20 10:57:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 13626 states and 64831 transitions. [2022-11-20 10:57:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:28,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:28,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:28,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-20 10:57:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:28,459 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1103008676, now seen corresponding path program 8 times [2022-11-20 10:57:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421957003] [2022-11-20 10:57:28,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:28,460 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 [2022-11-20 10:57:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:28,461 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-20 10:57:28,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:57:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:28,898 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:28,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:29,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:29,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421957003] [2022-11-20 10:57:29,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421957003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:29,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:29,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978130517] [2022-11-20 10:57:29,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:29,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:29,179 INFO L87 Difference]: Start difference. First operand 13626 states and 64831 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:29,425 INFO L93 Difference]: Finished difference Result 13672 states and 65022 transitions. [2022-11-20 10:57:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:29,473 INFO L225 Difference]: With dead ends: 13672 [2022-11-20 10:57:29,473 INFO L226 Difference]: Without dead ends: 13672 [2022-11-20 10:57:29,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:29,474 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:29,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 10:57:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13672 states. [2022-11-20 10:57:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13672 to 13630. [2022-11-20 10:57:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 13621 states have (on average 4.760663681080684) internal successors, (64845), 13629 states have internal predecessors, (64845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 64845 transitions. [2022-11-20 10:57:29,773 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 64845 transitions. Word has length 13 [2022-11-20 10:57:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:29,774 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 64845 transitions. [2022-11-20 10:57:29,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 64845 transitions. [2022-11-20 10:57:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:29,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:29,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:29,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:29,989 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 987140906, now seen corresponding path program 9 times [2022-11-20 10:57:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:29,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259923600] [2022-11-20 10:57:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:29,990 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 [2022-11-20 10:57:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:29,991 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:29,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-20 10:57:30,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:57:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:30,420 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:30,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:30,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:30,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:30,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259923600] [2022-11-20 10:57:30,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259923600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:30,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629223215] [2022-11-20 10:57:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:30,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:30,717 INFO L87 Difference]: Start difference. First operand 13630 states and 64845 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:30,957 INFO L93 Difference]: Finished difference Result 13652 states and 64936 transitions. [2022-11-20 10:57:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:30,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:31,007 INFO L225 Difference]: With dead ends: 13652 [2022-11-20 10:57:31,007 INFO L226 Difference]: Without dead ends: 13652 [2022-11-20 10:57:31,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:31,007 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:31,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:57:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13652 states. [2022-11-20 10:57:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13652 to 13622. [2022-11-20 10:57:31,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13622 states, 13613 states have (on average 4.7613310805847355) internal successors, (64816), 13621 states have internal predecessors, (64816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13622 states to 13622 states and 64816 transitions. [2022-11-20 10:57:31,304 INFO L78 Accepts]: Start accepts. Automaton has 13622 states and 64816 transitions. Word has length 13 [2022-11-20 10:57:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:31,304 INFO L495 AbstractCegarLoop]: Abstraction has 13622 states and 64816 transitions. [2022-11-20 10:57:31,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 13622 states and 64816 transitions. [2022-11-20 10:57:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:57:31,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:31,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:31,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-20 10:57:31,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:31,510 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash 987173642, now seen corresponding path program 6 times [2022-11-20 10:57:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:31,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698213924] [2022-11-20 10:57:31,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:57:31,511 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 [2022-11-20 10:57:31,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:31,512 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:31,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-20 10:57:31,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 10:57:31,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:31,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:57:31,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:31,940 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:31,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:32,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:32,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698213924] [2022-11-20 10:57:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698213924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:32,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:32,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:57:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160166794] [2022-11-20 10:57:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:57:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:57:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:57:32,233 INFO L87 Difference]: Start difference. First operand 13622 states and 64816 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:32,481 INFO L93 Difference]: Finished difference Result 13631 states and 64846 transitions. [2022-11-20 10:57:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:57:32,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2022-11-20 10:57:32,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:32,531 INFO L225 Difference]: With dead ends: 13631 [2022-11-20 10:57:32,531 INFO L226 Difference]: Without dead ends: 13631 [2022-11-20 10:57:32,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:57:32,531 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:32,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 10:57:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13631 states. [2022-11-20 10:57:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13631 to 13614. [2022-11-20 10:57:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13614 states, 13605 states have (on average 4.761631753031973) internal successors, (64782), 13613 states have internal predecessors, (64782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13614 states to 13614 states and 64782 transitions. [2022-11-20 10:57:32,952 INFO L78 Accepts]: Start accepts. Automaton has 13614 states and 64782 transitions. Word has length 13 [2022-11-20 10:57:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:32,953 INFO L495 AbstractCegarLoop]: Abstraction has 13614 states and 64782 transitions. [2022-11-20 10:57:32,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-20 10:57:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 13614 states and 64782 transitions. [2022-11-20 10:57:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:32,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:32,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:32,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-20 10:57:33,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:33,158 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1531035266, now seen corresponding path program 5 times [2022-11-20 10:57:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:33,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270738667] [2022-11-20 10:57:33,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:57:33,159 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 [2022-11-20 10:57:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:33,160 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:33,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-20 10:57:33,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:57:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:57:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:33,685 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:33,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:34,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:35,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270738667] [2022-11-20 10:57:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270738667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:35,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:35,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:57:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528841358] [2022-11-20 10:57:35,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:57:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:57:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:57:35,680 INFO L87 Difference]: Start difference. First operand 13614 states and 64782 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:57:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:41,407 INFO L93 Difference]: Finished difference Result 20318 states and 95979 transitions. [2022-11-20 10:57:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:57:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 [2022-11-20 10:57:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:41,486 INFO L225 Difference]: With dead ends: 20318 [2022-11-20 10:57:41,486 INFO L226 Difference]: Without dead ends: 20318 [2022-11-20 10:57:41,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:57:41,487 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:41,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 71 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 433 Invalid, 0 Unknown, 345 Unchecked, 3.7s Time] [2022-11-20 10:57:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20318 states. [2022-11-20 10:57:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20318 to 16942. [2022-11-20 10:57:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16942 states, 16933 states have (on average 4.8611586842260675) internal successors, (82314), 16941 states have internal predecessors, (82314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16942 states to 16942 states and 82314 transitions. [2022-11-20 10:57:41,902 INFO L78 Accepts]: Start accepts. Automaton has 16942 states and 82314 transitions. Word has length 14 [2022-11-20 10:57:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:41,903 INFO L495 AbstractCegarLoop]: Abstraction has 16942 states and 82314 transitions. [2022-11-20 10:57:41,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:57:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16942 states and 82314 transitions. [2022-11-20 10:57:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:41,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:41,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:41,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Ended with exit code 0 [2022-11-20 10:57:42,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:42,109 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:42,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1501253876, now seen corresponding path program 6 times [2022-11-20 10:57:42,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:42,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982590697] [2022-11-20 10:57:42,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:57:42,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:42,110 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:42,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-20 10:57:42,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:57:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:42,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:57:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:42,628 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:42,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:57:43,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:57:44,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982590697] [2022-11-20 10:57:44,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982590697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:44,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:44,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:57:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6663451] [2022-11-20 10:57:44,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:44,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:57:44,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:57:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:57:44,287 INFO L87 Difference]: Start difference. First operand 16942 states and 82314 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:57:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:46,789 INFO L93 Difference]: Finished difference Result 18014 states and 86946 transitions. [2022-11-20 10:57:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:57:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 14 [2022-11-20 10:57:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:46,863 INFO L225 Difference]: With dead ends: 18014 [2022-11-20 10:57:46,864 INFO L226 Difference]: Without dead ends: 18014 [2022-11-20 10:57:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:57:46,864 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 68 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:46,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 169 Unchecked, 1.7s Time] [2022-11-20 10:57:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18014 states. [2022-11-20 10:57:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18014 to 17352. [2022-11-20 10:57:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17352 states, 17343 states have (on average 4.847142939514502) internal successors, (84064), 17351 states have internal predecessors, (84064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17352 states to 17352 states and 84064 transitions. [2022-11-20 10:57:47,262 INFO L78 Accepts]: Start accepts. Automaton has 17352 states and 84064 transitions. Word has length 14 [2022-11-20 10:57:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 17352 states and 84064 transitions. [2022-11-20 10:57:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-20 10:57:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 17352 states and 84064 transitions. [2022-11-20 10:57:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:47,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:47,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:47,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Ended with exit code 0 [2022-11-20 10:57:47,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:47,468 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash 621894917, now seen corresponding path program 1 times [2022-11-20 10:57:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943155540] [2022-11-20 10:57:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:47,469 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 [2022-11-20 10:57:47,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:47,470 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:47,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-20 10:57:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:57:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:47,954 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:47,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:48,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:49,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943155540] [2022-11-20 10:57:49,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943155540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:49,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:57:49,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513615980] [2022-11-20 10:57:49,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:49,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:57:49,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:57:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:57:49,174 INFO L87 Difference]: Start difference. First operand 17352 states and 84064 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:57:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:49,507 INFO L93 Difference]: Finished difference Result 18045 states and 87092 transitions. [2022-11-20 10:57:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:57:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:57:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:49,576 INFO L225 Difference]: With dead ends: 18045 [2022-11-20 10:57:49,576 INFO L226 Difference]: Without dead ends: 18045 [2022-11-20 10:57:49,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:57:49,576 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:49,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-20 10:57:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18045 states. [2022-11-20 10:57:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18045 to 17373. [2022-11-20 10:57:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17364 states have (on average 4.844736235890347) internal successors, (84124), 17372 states have internal predecessors, (84124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 84124 transitions. [2022-11-20 10:57:49,979 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 84124 transitions. Word has length 14 [2022-11-20 10:57:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:49,979 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 84124 transitions. [2022-11-20 10:57:49,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:57:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 84124 transitions. [2022-11-20 10:57:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:49,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:49,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:49,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:50,185 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 619790327, now seen corresponding path program 2 times [2022-11-20 10:57:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:50,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036635566] [2022-11-20 10:57:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:50,185 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 [2022-11-20 10:57:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:50,186 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:50,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-20 10:57:50,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:57:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:57:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:50,694 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:50,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:51,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:51,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036635566] [2022-11-20 10:57:51,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036635566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:51,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:51,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:57:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12173376] [2022-11-20 10:57:51,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:51,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:57:51,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:57:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:57:51,591 INFO L87 Difference]: Start difference. First operand 17373 states and 84124 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:57:51,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:51,895 INFO L93 Difference]: Finished difference Result 17707 states and 85616 transitions. [2022-11-20 10:57:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:57:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:57:51,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:51,963 INFO L225 Difference]: With dead ends: 17707 [2022-11-20 10:57:51,963 INFO L226 Difference]: Without dead ends: 17707 [2022-11-20 10:57:51,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:57:51,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:51,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:57:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17707 states. [2022-11-20 10:57:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17707 to 17376. [2022-11-20 10:57:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17367 states have (on average 4.844072090746819) internal successors, (84127), 17375 states have internal predecessors, (84127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 84127 transitions. [2022-11-20 10:57:52,363 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 84127 transitions. Word has length 14 [2022-11-20 10:57:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:52,363 INFO L495 AbstractCegarLoop]: Abstraction has 17376 states and 84127 transitions. [2022-11-20 10:57:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:57:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 84127 transitions. [2022-11-20 10:57:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:52,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:52,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:52,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-20 10:57:52,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:52,569 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash 780978857, now seen corresponding path program 3 times [2022-11-20 10:57:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452400901] [2022-11-20 10:57:52,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:52,570 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 [2022-11-20 10:57:52,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:52,571 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:52,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-20 10:57:52,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:57:52,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:57:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:53,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:53,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:53,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:57:53,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:53,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452400901] [2022-11-20 10:57:53,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452400901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:53,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:53,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:57:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192429555] [2022-11-20 10:57:53,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:53,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:57:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:57:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:57:53,967 INFO L87 Difference]: Start difference. First operand 17376 states and 84127 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:57:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:54,597 INFO L93 Difference]: Finished difference Result 17979 states and 86767 transitions. [2022-11-20 10:57:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:57:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:57:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:54,668 INFO L225 Difference]: With dead ends: 17979 [2022-11-20 10:57:54,668 INFO L226 Difference]: Without dead ends: 17979 [2022-11-20 10:57:54,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:57:54,668 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:54,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-20 10:57:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17979 states. [2022-11-20 10:57:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17979 to 17376. [2022-11-20 10:57:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17367 states have (on average 4.844072090746819) internal successors, (84127), 17375 states have internal predecessors, (84127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 84127 transitions. [2022-11-20 10:57:55,227 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 84127 transitions. Word has length 14 [2022-11-20 10:57:55,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:55,227 INFO L495 AbstractCegarLoop]: Abstraction has 17376 states and 84127 transitions. [2022-11-20 10:57:55,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:57:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 84127 transitions. [2022-11-20 10:57:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:55,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:55,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:55,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-20 10:57:55,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:55,433 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -389184621, now seen corresponding path program 4 times [2022-11-20 10:57:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:55,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410308789] [2022-11-20 10:57:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:57:55,434 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 [2022-11-20 10:57:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:55,435 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-20 10:57:55,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:57:55,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:57:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:55,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:55,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:56,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:57,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:57,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410308789] [2022-11-20 10:57:57,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410308789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:57,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:57,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:57:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652084072] [2022-11-20 10:57:57,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:57,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:57:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:57:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:57:57,052 INFO L87 Difference]: Start difference. First operand 17376 states and 84127 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:57:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:57,690 INFO L93 Difference]: Finished difference Result 18068 states and 87163 transitions. [2022-11-20 10:57:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:57:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:57:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:57,759 INFO L225 Difference]: With dead ends: 18068 [2022-11-20 10:57:57,759 INFO L226 Difference]: Without dead ends: 18068 [2022-11-20 10:57:57,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:57:57,760 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:57,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2022-11-20 10:57:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18068 states. [2022-11-20 10:57:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18068 to 17504. [2022-11-20 10:57:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17504 states, 17495 states have (on average 4.841497570734496) internal successors, (84702), 17503 states have internal predecessors, (84702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17504 states to 17504 states and 84702 transitions. [2022-11-20 10:57:58,163 INFO L78 Accepts]: Start accepts. Automaton has 17504 states and 84702 transitions. Word has length 14 [2022-11-20 10:57:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:58,163 INFO L495 AbstractCegarLoop]: Abstraction has 17504 states and 84702 transitions. [2022-11-20 10:57:58,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:57:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 17504 states and 84702 transitions. [2022-11-20 10:57:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:57:58,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:58,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:58,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:58,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:58,369 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:57:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash -391289211, now seen corresponding path program 5 times [2022-11-20 10:57:58,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:58,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923687051] [2022-11-20 10:57:58,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:57:58,370 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 [2022-11-20 10:57:58,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:58,371 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:57:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-20 10:57:58,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:57:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:57:58,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:58,954 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:57:58,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:57:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:57:59,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:00,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923687051] [2022-11-20 10:58:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923687051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:00,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:00,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:58:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261686547] [2022-11-20 10:58:00,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:00,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:58:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:58:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:58:00,291 INFO L87 Difference]: Start difference. First operand 17504 states and 84702 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:58:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:03,325 INFO L93 Difference]: Finished difference Result 20899 states and 101130 transitions. [2022-11-20 10:58:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:58:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 [2022-11-20 10:58:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:03,411 INFO L225 Difference]: With dead ends: 20899 [2022-11-20 10:58:03,412 INFO L226 Difference]: Without dead ends: 20899 [2022-11-20 10:58:03,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:58:03,412 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:03,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 55 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 379 Invalid, 0 Unknown, 137 Unchecked, 2.1s Time] [2022-11-20 10:58:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20899 states. [2022-11-20 10:58:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20899 to 17566. [2022-11-20 10:58:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17566 states, 17557 states have (on average 4.839892920202768) internal successors, (84974), 17565 states have internal predecessors, (84974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17566 states to 17566 states and 84974 transitions. [2022-11-20 10:58:03,850 INFO L78 Accepts]: Start accepts. Automaton has 17566 states and 84974 transitions. Word has length 14 [2022-11-20 10:58:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:03,850 INFO L495 AbstractCegarLoop]: Abstraction has 17566 states and 84974 transitions. [2022-11-20 10:58:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:58:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17566 states and 84974 transitions. [2022-11-20 10:58:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:03,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:03,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:03,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Ended with exit code 0 [2022-11-20 10:58:04,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:04,056 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:04,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash -377000102, now seen corresponding path program 1 times [2022-11-20 10:58:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184437145] [2022-11-20 10:58:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:04,056 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 [2022-11-20 10:58:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:04,057 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:04,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-20 10:58:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:04,548 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:04,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:05,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:05,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184437145] [2022-11-20 10:58:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184437145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:05,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:05,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346319728] [2022-11-20 10:58:05,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:05,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:05,806 INFO L87 Difference]: Start difference. First operand 17566 states and 84974 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:07,047 INFO L93 Difference]: Finished difference Result 24166 states and 118479 transitions. [2022-11-20 10:58:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:58:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:07,168 INFO L225 Difference]: With dead ends: 24166 [2022-11-20 10:58:07,168 INFO L226 Difference]: Without dead ends: 24166 [2022-11-20 10:58:07,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:07,168 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:07,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 203 Unchecked, 0.9s Time] [2022-11-20 10:58:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24166 states. [2022-11-20 10:58:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24166 to 18945. [2022-11-20 10:58:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18945 states, 18936 states have (on average 4.8798056611744824) internal successors, (92404), 18944 states have internal predecessors, (92404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18945 states to 18945 states and 92404 transitions. [2022-11-20 10:58:07,810 INFO L78 Accepts]: Start accepts. Automaton has 18945 states and 92404 transitions. Word has length 14 [2022-11-20 10:58:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:07,811 INFO L495 AbstractCegarLoop]: Abstraction has 18945 states and 92404 transitions. [2022-11-20 10:58:07,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18945 states and 92404 transitions. [2022-11-20 10:58:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:07,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:07,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:07,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-20 10:58:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:08,020 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash -374666391, now seen corresponding path program 6 times [2022-11-20 10:58:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923008784] [2022-11-20 10:58:08,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:58:08,021 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 [2022-11-20 10:58:08,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:08,022 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:08,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-20 10:58:08,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:58:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:08,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:08,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:08,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:09,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923008784] [2022-11-20 10:58:09,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923008784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:09,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:09,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258545537] [2022-11-20 10:58:09,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:09,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:09,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:09,422 INFO L87 Difference]: Start difference. First operand 18945 states and 92404 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:10,251 INFO L93 Difference]: Finished difference Result 23641 states and 117348 transitions. [2022-11-20 10:58:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:10,349 INFO L225 Difference]: With dead ends: 23641 [2022-11-20 10:58:10,349 INFO L226 Difference]: Without dead ends: 23641 [2022-11-20 10:58:10,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:10,349 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:10,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 73 Unchecked, 0.6s Time] [2022-11-20 10:58:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23641 states. [2022-11-20 10:58:10,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23641 to 21217. [2022-11-20 10:58:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21217 states, 21208 states have (on average 4.9460109392682) internal successors, (104895), 21216 states have internal predecessors, (104895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21217 states to 21217 states and 104895 transitions. [2022-11-20 10:58:10,875 INFO L78 Accepts]: Start accepts. Automaton has 21217 states and 104895 transitions. Word has length 14 [2022-11-20 10:58:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:10,875 INFO L495 AbstractCegarLoop]: Abstraction has 21217 states and 104895 transitions. [2022-11-20 10:58:10,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21217 states and 104895 transitions. [2022-11-20 10:58:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:10,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:10,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:10,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Ended with exit code 0 [2022-11-20 10:58:11,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:11,081 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -439925421, now seen corresponding path program 7 times [2022-11-20 10:58:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143314004] [2022-11-20 10:58:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:58:11,082 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 [2022-11-20 10:58:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:11,083 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-20 10:58:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:11,572 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:11,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:11,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:12,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143314004] [2022-11-20 10:58:12,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143314004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:12,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:12,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647097952] [2022-11-20 10:58:12,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:12,685 INFO L87 Difference]: Start difference. First operand 21217 states and 104895 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:13,937 INFO L93 Difference]: Finished difference Result 23739 states and 117445 transitions. [2022-11-20 10:58:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:58:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:14,036 INFO L225 Difference]: With dead ends: 23739 [2022-11-20 10:58:14,037 INFO L226 Difference]: Without dead ends: 23739 [2022-11-20 10:58:14,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:14,037 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:14,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 142 Unchecked, 1.0s Time] [2022-11-20 10:58:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23739 states. [2022-11-20 10:58:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23739 to 21198. [2022-11-20 10:58:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21189 states have (on average 4.948275048374156) internal successors, (104849), 21197 states have internal predecessors, (104849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 104849 transitions. [2022-11-20 10:58:14,765 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 104849 transitions. Word has length 14 [2022-11-20 10:58:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:14,765 INFO L495 AbstractCegarLoop]: Abstraction has 21198 states and 104849 transitions. [2022-11-20 10:58:14,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 104849 transitions. [2022-11-20 10:58:14,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:14,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:14,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:14,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-20 10:58:14,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:14,972 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:14,972 INFO L85 PathProgramCache]: Analyzing trace with hash 285552912, now seen corresponding path program 2 times [2022-11-20 10:58:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:14,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951830110] [2022-11-20 10:58:14,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:14,973 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 [2022-11-20 10:58:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:14,974 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:14,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-20 10:58:15,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:15,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:15,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:15,508 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:15,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:15,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:16,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:16,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951830110] [2022-11-20 10:58:16,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951830110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:16,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856020089] [2022-11-20 10:58:16,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:16,359 INFO L87 Difference]: Start difference. First operand 21198 states and 104849 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:16,968 INFO L93 Difference]: Finished difference Result 21986 states and 108890 transitions. [2022-11-20 10:58:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:17,056 INFO L225 Difference]: With dead ends: 21986 [2022-11-20 10:58:17,056 INFO L226 Difference]: Without dead ends: 21986 [2022-11-20 10:58:17,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:17,057 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:17,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-11-20 10:58:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2022-11-20 10:58:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 21359. [2022-11-20 10:58:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 21350 states have (on average 4.953629976580796) internal successors, (105760), 21358 states have internal predecessors, (105760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 105760 transitions. [2022-11-20 10:58:17,748 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 105760 transitions. Word has length 14 [2022-11-20 10:58:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:17,748 INFO L495 AbstractCegarLoop]: Abstraction has 21359 states and 105760 transitions. [2022-11-20 10:58:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 105760 transitions. [2022-11-20 10:58:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:17,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:17,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:17,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-20 10:58:17,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:17,954 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash 259634742, now seen corresponding path program 3 times [2022-11-20 10:58:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:17,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727475382] [2022-11-20 10:58:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:58:17,955 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 [2022-11-20 10:58:17,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:17,956 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:18,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-20 10:58:18,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:58:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:18,730 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:18,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:19,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727475382] [2022-11-20 10:58:19,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727475382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:19,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:19,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:19,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890395880] [2022-11-20 10:58:19,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:19,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:19,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:19,622 INFO L87 Difference]: Start difference. First operand 21359 states and 105760 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:20,395 INFO L93 Difference]: Finished difference Result 22201 states and 110102 transitions. [2022-11-20 10:58:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:20,578 INFO L225 Difference]: With dead ends: 22201 [2022-11-20 10:58:20,579 INFO L226 Difference]: Without dead ends: 22201 [2022-11-20 10:58:20,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:20,579 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:20,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-20 10:58:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22201 states. [2022-11-20 10:58:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22201 to 21411. [2022-11-20 10:58:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21411 states, 21402 states have (on average 4.954910756004112) internal successors, (106045), 21410 states have internal predecessors, (106045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21411 states to 21411 states and 106045 transitions. [2022-11-20 10:58:21,304 INFO L78 Accepts]: Start accepts. Automaton has 21411 states and 106045 transitions. Word has length 14 [2022-11-20 10:58:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:21,305 INFO L495 AbstractCegarLoop]: Abstraction has 21411 states and 106045 transitions. [2022-11-20 10:58:21,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21411 states and 106045 transitions. [2022-11-20 10:58:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:21,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:21,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:21,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:21,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:21,526 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 263537363, now seen corresponding path program 8 times [2022-11-20 10:58:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626450078] [2022-11-20 10:58:21,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:21,527 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 [2022-11-20 10:58:21,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:21,528 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:21,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-20 10:58:21,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:21,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:21,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:22,031 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:22,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:22,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:23,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626450078] [2022-11-20 10:58:23,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626450078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:23,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:23,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518764632] [2022-11-20 10:58:23,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:23,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:23,039 INFO L87 Difference]: Start difference. First operand 21411 states and 106045 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:23,618 INFO L93 Difference]: Finished difference Result 21831 states and 107920 transitions. [2022-11-20 10:58:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:23,834 INFO L225 Difference]: With dead ends: 21831 [2022-11-20 10:58:23,835 INFO L226 Difference]: Without dead ends: 21831 [2022-11-20 10:58:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:23,835 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:23,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2022-11-20 10:58:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21831 states. [2022-11-20 10:58:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21831 to 21414. [2022-11-20 10:58:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21414 states, 21405 states have (on average 4.954776921280075) internal successors, (106057), 21413 states have internal predecessors, (106057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21414 states to 21414 states and 106057 transitions. [2022-11-20 10:58:24,654 INFO L78 Accepts]: Start accepts. Automaton has 21414 states and 106057 transitions. Word has length 14 [2022-11-20 10:58:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:24,655 INFO L495 AbstractCegarLoop]: Abstraction has 21414 states and 106057 transitions. [2022-11-20 10:58:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21414 states and 106057 transitions. [2022-11-20 10:58:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:24,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:24,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:24,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:24,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:24,876 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash 261964392, now seen corresponding path program 4 times [2022-11-20 10:58:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522037479] [2022-11-20 10:58:24,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:58:24,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:24,877 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:24,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-20 10:58:25,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:58:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:25,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:25,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:25,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:26,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:26,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522037479] [2022-11-20 10:58:26,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522037479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:26,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:26,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858723724] [2022-11-20 10:58:26,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:26,450 INFO L87 Difference]: Start difference. First operand 21414 states and 106057 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:27,406 INFO L93 Difference]: Finished difference Result 23398 states and 116339 transitions. [2022-11-20 10:58:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:58:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:27,500 INFO L225 Difference]: With dead ends: 23398 [2022-11-20 10:58:27,500 INFO L226 Difference]: Without dead ends: 23398 [2022-11-20 10:58:27,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:27,500 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:27,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2022-11-20 10:58:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23398 states. [2022-11-20 10:58:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23398 to 21426. [2022-11-20 10:58:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21426 states, 21417 states have (on average 4.953868422281365) internal successors, (106097), 21425 states have internal predecessors, (106097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21426 states to 21426 states and 106097 transitions. [2022-11-20 10:58:28,480 INFO L78 Accepts]: Start accepts. Automaton has 21426 states and 106097 transitions. Word has length 14 [2022-11-20 10:58:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:28,480 INFO L495 AbstractCegarLoop]: Abstraction has 21426 states and 106097 transitions. [2022-11-20 10:58:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 21426 states and 106097 transitions. [2022-11-20 10:58:28,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:28,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:28,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:28,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:28,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:28,687 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash 261968453, now seen corresponding path program 9 times [2022-11-20 10:58:28,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:28,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239485566] [2022-11-20 10:58:28,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:58:28,688 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 [2022-11-20 10:58:28,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:28,689 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:28,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-20 10:58:29,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:58:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:29,206 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:29,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:29,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:30,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:30,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239485566] [2022-11-20 10:58:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239485566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:30,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738475550] [2022-11-20 10:58:30,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:30,079 INFO L87 Difference]: Start difference. First operand 21426 states and 106097 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:30,966 INFO L93 Difference]: Finished difference Result 21862 states and 108033 transitions. [2022-11-20 10:58:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:31,050 INFO L225 Difference]: With dead ends: 21862 [2022-11-20 10:58:31,050 INFO L226 Difference]: Without dead ends: 21862 [2022-11-20 10:58:31,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:31,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:31,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 29 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-20 10:58:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21862 states. [2022-11-20 10:58:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21862 to 21454. [2022-11-20 10:58:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21454 states, 21445 states have (on average 4.95420844019585) internal successors, (106243), 21453 states have internal predecessors, (106243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21454 states to 21454 states and 106243 transitions. [2022-11-20 10:58:31,673 INFO L78 Accepts]: Start accepts. Automaton has 21454 states and 106243 transitions. Word has length 14 [2022-11-20 10:58:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:31,673 INFO L495 AbstractCegarLoop]: Abstraction has 21454 states and 106243 transitions. [2022-11-20 10:58:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 21454 states and 106243 transitions. [2022-11-20 10:58:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:31,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:31,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:31,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:31,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:31,879 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1643360180, now seen corresponding path program 5 times [2022-11-20 10:58:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:31,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25273939] [2022-11-20 10:58:31,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:58:31,880 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 [2022-11-20 10:58:31,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:31,881 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-20 10:58:32,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:58:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:32,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:32,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:33,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:34,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:34,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25273939] [2022-11-20 10:58:34,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25273939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:34,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:34,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:58:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825433478] [2022-11-20 10:58:34,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:58:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:58:34,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:58:34,059 INFO L87 Difference]: Start difference. First operand 21454 states and 106243 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:58:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:37,839 INFO L93 Difference]: Finished difference Result 28685 states and 140386 transitions. [2022-11-20 10:58:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:58:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 [2022-11-20 10:58:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:37,987 INFO L225 Difference]: With dead ends: 28685 [2022-11-20 10:58:37,988 INFO L226 Difference]: Without dead ends: 28685 [2022-11-20 10:58:37,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:58:37,988 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 247 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:37,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 51 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 273 Unchecked, 2.7s Time] [2022-11-20 10:58:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28685 states. [2022-11-20 10:58:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28685 to 19614. [2022-11-20 10:58:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19614 states, 19605 states have (on average 4.913899515429737) internal successors, (96337), 19613 states have internal predecessors, (96337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19614 states to 19614 states and 96337 transitions. [2022-11-20 10:58:38,732 INFO L78 Accepts]: Start accepts. Automaton has 19614 states and 96337 transitions. Word has length 14 [2022-11-20 10:58:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:38,733 INFO L495 AbstractCegarLoop]: Abstraction has 19614 states and 96337 transitions. [2022-11-20 10:58:38,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:58:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19614 states and 96337 transitions. [2022-11-20 10:58:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:38,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:38,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:38,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:39,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:39,102 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:39,103 INFO L85 PathProgramCache]: Analyzing trace with hash 707667134, now seen corresponding path program 6 times [2022-11-20 10:58:39,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:39,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546753415] [2022-11-20 10:58:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:58:39,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:39,104 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:39,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-20 10:58:39,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:58:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:39,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:39,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:39,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:40,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:40,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546753415] [2022-11-20 10:58:40,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546753415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:40,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:40,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:40,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620405467] [2022-11-20 10:58:40,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:40,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:40,535 INFO L87 Difference]: Start difference. First operand 19614 states and 96337 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:41,187 INFO L93 Difference]: Finished difference Result 20403 states and 100542 transitions. [2022-11-20 10:58:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:41,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:41,267 INFO L225 Difference]: With dead ends: 20403 [2022-11-20 10:58:41,267 INFO L226 Difference]: Without dead ends: 20403 [2022-11-20 10:58:41,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:41,267 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:41,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-20 10:58:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2022-11-20 10:58:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 19818. [2022-11-20 10:58:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19818 states, 19809 states have (on average 4.923469130193347) internal successors, (97529), 19817 states have internal predecessors, (97529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19818 states to 19818 states and 97529 transitions. [2022-11-20 10:58:41,871 INFO L78 Accepts]: Start accepts. Automaton has 19818 states and 97529 transitions. Word has length 14 [2022-11-20 10:58:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:41,871 INFO L495 AbstractCegarLoop]: Abstraction has 19818 states and 97529 transitions. [2022-11-20 10:58:41,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19818 states and 97529 transitions. [2022-11-20 10:58:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:41,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:41,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:41,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-20 10:58:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:42,077 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 705413744, now seen corresponding path program 7 times [2022-11-20 10:58:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:42,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306864717] [2022-11-20 10:58:42,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:58:42,078 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 [2022-11-20 10:58:42,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:42,078 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:42,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-20 10:58:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:42,582 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:42,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:42,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:43,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306864717] [2022-11-20 10:58:43,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306864717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:43,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:43,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686610505] [2022-11-20 10:58:43,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:43,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:43,827 INFO L87 Difference]: Start difference. First operand 19818 states and 97529 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:44,575 INFO L93 Difference]: Finished difference Result 20316 states and 99973 transitions. [2022-11-20 10:58:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:58:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:44,675 INFO L225 Difference]: With dead ends: 20316 [2022-11-20 10:58:44,675 INFO L226 Difference]: Without dead ends: 20316 [2022-11-20 10:58:44,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:44,676 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:44,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-20 10:58:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20316 states. [2022-11-20 10:58:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20316 to 19899. [2022-11-20 10:58:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19899 states, 19890 states have (on average 4.92589240824535) internal successors, (97976), 19898 states have internal predecessors, (97976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19899 states to 19899 states and 97976 transitions. [2022-11-20 10:58:45,548 INFO L78 Accepts]: Start accepts. Automaton has 19899 states and 97976 transitions. Word has length 14 [2022-11-20 10:58:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:45,548 INFO L495 AbstractCegarLoop]: Abstraction has 19899 states and 97976 transitions. [2022-11-20 10:58:45,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 19899 states and 97976 transitions. [2022-11-20 10:58:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:45,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:45,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:45,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:45,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:45,754 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:45,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:45,754 INFO L85 PathProgramCache]: Analyzing trace with hash -24649276, now seen corresponding path program 8 times [2022-11-20 10:58:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278939867] [2022-11-20 10:58:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:45,755 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 [2022-11-20 10:58:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:45,756 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:45,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-20 10:58:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:46,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:46,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:46,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:47,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278939867] [2022-11-20 10:58:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278939867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:47,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:47,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:47,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901457688] [2022-11-20 10:58:47,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:47,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:47,180 INFO L87 Difference]: Start difference. First operand 19899 states and 97976 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:48,278 INFO L93 Difference]: Finished difference Result 24503 states and 122411 transitions. [2022-11-20 10:58:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:48,379 INFO L225 Difference]: With dead ends: 24503 [2022-11-20 10:58:48,379 INFO L226 Difference]: Without dead ends: 24503 [2022-11-20 10:58:48,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:48,379 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:48,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 108 Unchecked, 0.9s Time] [2022-11-20 10:58:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24503 states. [2022-11-20 10:58:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24503 to 21099. [2022-11-20 10:58:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21099 states, 21090 states have (on average 4.971882408724514) internal successors, (104857), 21098 states have internal predecessors, (104857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21099 states to 21099 states and 104857 transitions. [2022-11-20 10:58:49,192 INFO L78 Accepts]: Start accepts. Automaton has 21099 states and 104857 transitions. Word has length 14 [2022-11-20 10:58:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:49,192 INFO L495 AbstractCegarLoop]: Abstraction has 21099 states and 104857 transitions. [2022-11-20 10:58:49,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 21099 states and 104857 transitions. [2022-11-20 10:58:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:49,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:49,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:49,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-20 10:58:49,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:49,398 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1360451325, now seen corresponding path program 1 times [2022-11-20 10:58:49,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:49,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399729571] [2022-11-20 10:58:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:49,399 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 [2022-11-20 10:58:49,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:49,400 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:49,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-20 10:58:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:49,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:50,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:51,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399729571] [2022-11-20 10:58:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399729571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:51,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:51,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753151473] [2022-11-20 10:58:51,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:51,150 INFO L87 Difference]: Start difference. First operand 21099 states and 104857 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:51,776 INFO L93 Difference]: Finished difference Result 21366 states and 106014 transitions. [2022-11-20 10:58:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:58:51,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:51,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:51,861 INFO L225 Difference]: With dead ends: 21366 [2022-11-20 10:58:51,861 INFO L226 Difference]: Without dead ends: 21366 [2022-11-20 10:58:51,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:51,861 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:51,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-20 10:58:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21366 states. [2022-11-20 10:58:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21366 to 21126. [2022-11-20 10:58:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21126 states, 21117 states have (on average 4.971492162712506) internal successors, (104983), 21125 states have internal predecessors, (104983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21126 states to 21126 states and 104983 transitions. [2022-11-20 10:58:52,567 INFO L78 Accepts]: Start accepts. Automaton has 21126 states and 104983 transitions. Word has length 14 [2022-11-20 10:58:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:52,567 INFO L495 AbstractCegarLoop]: Abstraction has 21126 states and 104983 transitions. [2022-11-20 10:58:52,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21126 states and 104983 transitions. [2022-11-20 10:58:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:52,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:52,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:52,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:52,774 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1247841345, now seen corresponding path program 2 times [2022-11-20 10:58:52,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:52,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5346827] [2022-11-20 10:58:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:52,775 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 [2022-11-20 10:58:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:52,776 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:52,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-20 10:58:53,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:58:53,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:53,307 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:53,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:53,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:54,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5346827] [2022-11-20 10:58:54,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5346827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:54,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:54,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:58:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546741934] [2022-11-20 10:58:54,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:54,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:58:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:58:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:58:54,193 INFO L87 Difference]: Start difference. First operand 21126 states and 104983 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:54,797 INFO L93 Difference]: Finished difference Result 21375 states and 106094 transitions. [2022-11-20 10:58:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:58:54,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:58:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:54,883 INFO L225 Difference]: With dead ends: 21375 [2022-11-20 10:58:54,884 INFO L226 Difference]: Without dead ends: 21375 [2022-11-20 10:58:54,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:58:54,884 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:54,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-20 10:58:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21375 states. [2022-11-20 10:58:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21375 to 21144. [2022-11-20 10:58:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21144 states, 21135 states have (on average 4.971942275845754) internal successors, (105082), 21143 states have internal predecessors, (105082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21144 states to 21144 states and 105082 transitions. [2022-11-20 10:58:55,795 INFO L78 Accepts]: Start accepts. Automaton has 21144 states and 105082 transitions. Word has length 14 [2022-11-20 10:58:55,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:55,796 INFO L495 AbstractCegarLoop]: Abstraction has 21144 states and 105082 transitions. [2022-11-20 10:58:55,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:58:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 21144 states and 105082 transitions. [2022-11-20 10:58:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:55,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:55,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:55,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-20 10:58:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:56,006 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1248913821, now seen corresponding path program 1 times [2022-11-20 10:58:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55162528] [2022-11-20 10:58:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:56,007 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 [2022-11-20 10:58:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:56,008 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:56,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-20 10:58:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:56,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:58:56,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:56,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:58:56,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:58:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:56,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:58:57,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:57,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55162528] [2022-11-20 10:58:57,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55162528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:57,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:57,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:58:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927904913] [2022-11-20 10:58:57,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:57,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:58:57,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:57,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:58:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:58:57,899 INFO L87 Difference]: Start difference. First operand 21144 states and 105082 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:58,544 INFO L93 Difference]: Finished difference Result 21282 states and 105684 transitions. [2022-11-20 10:58:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:58:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:58:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:58,632 INFO L225 Difference]: With dead ends: 21282 [2022-11-20 10:58:58,632 INFO L226 Difference]: Without dead ends: 21282 [2022-11-20 10:58:58,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:58,632 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:58,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-20 10:58:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2022-11-20 10:58:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21154. [2022-11-20 10:58:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21154 states, 21145 states have (on average 4.971482620004729) internal successors, (105122), 21153 states have internal predecessors, (105122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21154 states to 21154 states and 105122 transitions. [2022-11-20 10:58:59,431 INFO L78 Accepts]: Start accepts. Automaton has 21154 states and 105122 transitions. Word has length 14 [2022-11-20 10:58:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:59,431 INFO L495 AbstractCegarLoop]: Abstraction has 21154 states and 105122 transitions. [2022-11-20 10:58:59,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:58:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21154 states and 105122 transitions. [2022-11-20 10:58:59,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:58:59,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:59,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:59,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:59,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:59,638 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:58:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1247215734, now seen corresponding path program 1 times [2022-11-20 10:58:59,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:59,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144798597] [2022-11-20 10:58:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:59,639 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 [2022-11-20 10:58:59,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:59,640 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:58:59,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-20 10:59:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:59:00,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:00,147 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:00,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:00,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:01,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:01,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144798597] [2022-11-20 10:59:01,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144798597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:01,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:01,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:59:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384304315] [2022-11-20 10:59:01,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:01,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:59:01,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:59:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:59:01,703 INFO L87 Difference]: Start difference. First operand 21154 states and 105122 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:59:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:12,337 INFO L93 Difference]: Finished difference Result 44955 states and 218094 transitions. [2022-11-20 10:59:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 10:59:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 [2022-11-20 10:59:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:12,535 INFO L225 Difference]: With dead ends: 44955 [2022-11-20 10:59:12,535 INFO L226 Difference]: Without dead ends: 44955 [2022-11-20 10:59:12,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=729, Invalid=1821, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 10:59:12,536 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 383 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:12,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 78 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 646 Invalid, 0 Unknown, 763 Unchecked, 3.6s Time] [2022-11-20 10:59:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44955 states. [2022-11-20 10:59:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44955 to 23190. [2022-11-20 10:59:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23190 states, 23181 states have (on average 5.042017169233424) internal successors, (116879), 23189 states have internal predecessors, (116879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23190 states to 23190 states and 116879 transitions. [2022-11-20 10:59:13,500 INFO L78 Accepts]: Start accepts. Automaton has 23190 states and 116879 transitions. Word has length 14 [2022-11-20 10:59:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:13,500 INFO L495 AbstractCegarLoop]: Abstraction has 23190 states and 116879 transitions. [2022-11-20 10:59:13,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:59:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23190 states and 116879 transitions. [2022-11-20 10:59:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:13,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:13,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:13,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:13,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:13,707 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1247284275, now seen corresponding path program 3 times [2022-11-20 10:59:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:13,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931215089] [2022-11-20 10:59:13,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:13,708 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 [2022-11-20 10:59:13,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:13,709 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:13,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-20 10:59:14,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:59:14,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:59:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:14,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:14,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:14,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:15,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:15,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931215089] [2022-11-20 10:59:15,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931215089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:15,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:15,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:59:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422749988] [2022-11-20 10:59:15,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:15,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:59:15,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:59:15,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:59:15,398 INFO L87 Difference]: Start difference. First operand 23190 states and 116879 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:15,991 INFO L93 Difference]: Finished difference Result 23379 states and 117715 transitions. [2022-11-20 10:59:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:59:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:59:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:16,083 INFO L225 Difference]: With dead ends: 23379 [2022-11-20 10:59:16,083 INFO L226 Difference]: Without dead ends: 23379 [2022-11-20 10:59:16,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:59:16,084 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:16,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 10:59:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23379 states. [2022-11-20 10:59:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23379 to 23190. [2022-11-20 10:59:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23190 states, 23181 states have (on average 5.042017169233424) internal successors, (116879), 23189 states have internal predecessors, (116879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23190 states to 23190 states and 116879 transitions. [2022-11-20 10:59:16,972 INFO L78 Accepts]: Start accepts. Automaton has 23190 states and 116879 transitions. Word has length 14 [2022-11-20 10:59:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:16,972 INFO L495 AbstractCegarLoop]: Abstraction has 23190 states and 116879 transitions. [2022-11-20 10:59:16,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 23190 states and 116879 transitions. [2022-11-20 10:59:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:16,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:16,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:16,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:17,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:17,182 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:17,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1247285391, now seen corresponding path program 2 times [2022-11-20 10:59:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:17,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170153319] [2022-11-20 10:59:17,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:17,183 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 [2022-11-20 10:59:17,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:17,186 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:17,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-20 10:59:17,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:17,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:59:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:17,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:17,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:18,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:18,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170153319] [2022-11-20 10:59:18,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170153319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:18,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:18,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:59:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957535505] [2022-11-20 10:59:18,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:59:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:59:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:59:18,683 INFO L87 Difference]: Start difference. First operand 23190 states and 116879 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:19,358 INFO L93 Difference]: Finished difference Result 23279 states and 117283 transitions. [2022-11-20 10:59:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:59:19,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:59:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:19,461 INFO L225 Difference]: With dead ends: 23279 [2022-11-20 10:59:19,462 INFO L226 Difference]: Without dead ends: 23279 [2022-11-20 10:59:19,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:59:19,462 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:19,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 17 Unchecked, 0.4s Time] [2022-11-20 10:59:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23279 states. [2022-11-20 10:59:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23279 to 23185. [2022-11-20 10:59:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23185 states, 23176 states have (on average 5.042026234035209) internal successors, (116854), 23184 states have internal predecessors, (116854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23185 states to 23185 states and 116854 transitions. [2022-11-20 10:59:20,288 INFO L78 Accepts]: Start accepts. Automaton has 23185 states and 116854 transitions. Word has length 14 [2022-11-20 10:59:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:20,288 INFO L495 AbstractCegarLoop]: Abstraction has 23185 states and 116854 transitions. [2022-11-20 10:59:20,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 23185 states and 116854 transitions. [2022-11-20 10:59:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:20,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:20,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:20,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Ended with exit code 0 [2022-11-20 10:59:20,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:20,495 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1247283624, now seen corresponding path program 2 times [2022-11-20 10:59:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649065940] [2022-11-20 10:59:20,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:20,496 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 [2022-11-20 10:59:20,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:20,497 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:20,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-20 10:59:20,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:59:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:21,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:21,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:21,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:22,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649065940] [2022-11-20 10:59:22,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649065940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:22,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:22,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:59:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117080752] [2022-11-20 10:59:22,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:22,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:59:22,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:59:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:59:22,964 INFO L87 Difference]: Start difference. First operand 23185 states and 116854 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:59:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:32,865 INFO L93 Difference]: Finished difference Result 46051 states and 221725 transitions. [2022-11-20 10:59:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:59:32,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 [2022-11-20 10:59:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:33,319 INFO L225 Difference]: With dead ends: 46051 [2022-11-20 10:59:33,319 INFO L226 Difference]: Without dead ends: 46051 [2022-11-20 10:59:33,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:59:33,320 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 334 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:33,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 76 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 789 Invalid, 0 Unknown, 98 Unchecked, 5.3s Time] [2022-11-20 10:59:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46051 states. [2022-11-20 10:59:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46051 to 26672. [2022-11-20 10:59:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26672 states, 26663 states have (on average 5.091850129392792) internal successors, (135764), 26671 states have internal predecessors, (135764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26672 states to 26672 states and 135764 transitions. [2022-11-20 10:59:34,378 INFO L78 Accepts]: Start accepts. Automaton has 26672 states and 135764 transitions. Word has length 14 [2022-11-20 10:59:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:34,378 INFO L495 AbstractCegarLoop]: Abstraction has 26672 states and 135764 transitions. [2022-11-20 10:59:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 10:59:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 26672 states and 135764 transitions. [2022-11-20 10:59:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:34,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:34,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:34,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:34,584 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1345733916, now seen corresponding path program 2 times [2022-11-20 10:59:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:34,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158575387] [2022-11-20 10:59:34,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:34,586 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 [2022-11-20 10:59:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:34,586 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:34,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-20 10:59:34,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:59:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:35,140 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:35,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:35,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:36,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:36,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158575387] [2022-11-20 10:59:36,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158575387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:36,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:36,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 10:59:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825315372] [2022-11-20 10:59:36,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:59:36,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:59:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:59:36,189 INFO L87 Difference]: Start difference. First operand 26672 states and 135764 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-20 10:59:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:38,955 INFO L93 Difference]: Finished difference Result 26366 states and 132040 transitions. [2022-11-20 10:59:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:59:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 14 [2022-11-20 10:59:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:39,096 INFO L225 Difference]: With dead ends: 26366 [2022-11-20 10:59:39,096 INFO L226 Difference]: Without dead ends: 26366 [2022-11-20 10:59:39,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:59:39,097 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:39,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 92 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 416 Invalid, 0 Unknown, 269 Unchecked, 1.6s Time] [2022-11-20 10:59:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26366 states. [2022-11-20 10:59:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26366 to 25492. [2022-11-20 10:59:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25492 states, 25483 states have (on average 5.064788290232704) internal successors, (129066), 25491 states have internal predecessors, (129066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25492 states to 25492 states and 129066 transitions. [2022-11-20 10:59:40,025 INFO L78 Accepts]: Start accepts. Automaton has 25492 states and 129066 transitions. Word has length 14 [2022-11-20 10:59:40,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:40,025 INFO L495 AbstractCegarLoop]: Abstraction has 25492 states and 129066 transitions. [2022-11-20 10:59:40,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-11-20 10:59:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 25492 states and 129066 transitions. [2022-11-20 10:59:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:40,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:40,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:40,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:40,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:40,246 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash 184601729, now seen corresponding path program 4 times [2022-11-20 10:59:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:40,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878239078] [2022-11-20 10:59:40,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:59:40,248 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 [2022-11-20 10:59:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:40,248 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:40,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-20 10:59:40,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:59:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:59:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:40,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:40,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:41,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:41,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:41,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878239078] [2022-11-20 10:59:41,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878239078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:41,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:41,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:59:41,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131638446] [2022-11-20 10:59:41,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:59:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:59:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:59:41,806 INFO L87 Difference]: Start difference. First operand 25492 states and 129066 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:59:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:42,612 INFO L93 Difference]: Finished difference Result 25774 states and 130293 transitions. [2022-11-20 10:59:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:59:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:59:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:42,715 INFO L225 Difference]: With dead ends: 25774 [2022-11-20 10:59:42,715 INFO L226 Difference]: Without dead ends: 25774 [2022-11-20 10:59:42,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:59:42,715 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:42,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2022-11-20 10:59:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25774 states. [2022-11-20 10:59:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25774 to 25564. [2022-11-20 10:59:43,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25564 states, 25555 states have (on average 5.06284484445314) internal successors, (129381), 25563 states have internal predecessors, (129381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25564 states to 25564 states and 129381 transitions. [2022-11-20 10:59:43,753 INFO L78 Accepts]: Start accepts. Automaton has 25564 states and 129381 transitions. Word has length 14 [2022-11-20 10:59:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:43,753 INFO L495 AbstractCegarLoop]: Abstraction has 25564 states and 129381 transitions. [2022-11-20 10:59:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:59:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 25564 states and 129381 transitions. [2022-11-20 10:59:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:43,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:43,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:43,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Ended with exit code 0 [2022-11-20 10:59:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:43,960 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 187407539, now seen corresponding path program 5 times [2022-11-20 10:59:43,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198962970] [2022-11-20 10:59:43,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:59:43,961 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 [2022-11-20 10:59:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:43,961 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:43,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-20 10:59:44,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:44,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:59:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:44,472 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:44,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:45,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:45,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198962970] [2022-11-20 10:59:45,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198962970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:45,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:45,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:59:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751335035] [2022-11-20 10:59:45,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:59:45,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:59:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:59:45,755 INFO L87 Difference]: Start difference. First operand 25564 states and 129381 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:59:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:47,813 INFO L93 Difference]: Finished difference Result 25988 states and 131008 transitions. [2022-11-20 10:59:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:59:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 [2022-11-20 10:59:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:47,917 INFO L225 Difference]: With dead ends: 25988 [2022-11-20 10:59:47,917 INFO L226 Difference]: Without dead ends: 25988 [2022-11-20 10:59:47,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:59:47,918 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:47,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 151 Unchecked, 1.5s Time] [2022-11-20 10:59:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25988 states. [2022-11-20 10:59:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25988 to 25564. [2022-11-20 10:59:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25564 states, 25555 states have (on average 5.062492662883976) internal successors, (129372), 25563 states have internal predecessors, (129372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25564 states to 25564 states and 129372 transitions. [2022-11-20 10:59:48,792 INFO L78 Accepts]: Start accepts. Automaton has 25564 states and 129372 transitions. Word has length 14 [2022-11-20 10:59:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:48,793 INFO L495 AbstractCegarLoop]: Abstraction has 25564 states and 129372 transitions. [2022-11-20 10:59:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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) [2022-11-20 10:59:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25564 states and 129372 transitions. [2022-11-20 10:59:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:48,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:48,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:48,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-20 10:59:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:49,000 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash 887668155, now seen corresponding path program 6 times [2022-11-20 10:59:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:49,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186168843] [2022-11-20 10:59:49,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:59:49,003 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 [2022-11-20 10:59:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:49,004 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:49,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-20 10:59:49,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:59:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:59:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:49,551 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:49,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:49,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:50,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186168843] [2022-11-20 10:59:50,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186168843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:50,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:50,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:59:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576842154] [2022-11-20 10:59:50,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:59:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:59:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:59:50,420 INFO L87 Difference]: Start difference. First operand 25564 states and 129372 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:50,779 INFO L93 Difference]: Finished difference Result 25678 states and 129887 transitions. [2022-11-20 10:59:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:59:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:59:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:51,267 INFO L225 Difference]: With dead ends: 25678 [2022-11-20 10:59:51,268 INFO L226 Difference]: Without dead ends: 25678 [2022-11-20 10:59:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:59:51,272 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:51,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 10:59:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25678 states. [2022-11-20 10:59:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25678 to 25564. [2022-11-20 10:59:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25564 states, 25555 states have (on average 5.062492662883976) internal successors, (129372), 25563 states have internal predecessors, (129372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25564 states to 25564 states and 129372 transitions. [2022-11-20 10:59:51,860 INFO L78 Accepts]: Start accepts. Automaton has 25564 states and 129372 transitions. Word has length 14 [2022-11-20 10:59:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:51,861 INFO L495 AbstractCegarLoop]: Abstraction has 25564 states and 129372 transitions. [2022-11-20 10:59:51,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25564 states and 129372 transitions. [2022-11-20 10:59:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:51,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:51,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:51,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Ended with exit code 0 [2022-11-20 10:59:52,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:52,067 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 887111085, now seen corresponding path program 7 times [2022-11-20 10:59:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725611460] [2022-11-20 10:59:52,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:59:52,068 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 [2022-11-20 10:59:52,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:52,069 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:52,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-20 10:59:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:59:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:52,905 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:52,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:53,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:54,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725611460] [2022-11-20 10:59:54,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725611460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:54,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:54,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:59:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593996775] [2022-11-20 10:59:54,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:59:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:59:54,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:59:54,023 INFO L87 Difference]: Start difference. First operand 25564 states and 129372 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:59:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:55,038 INFO L93 Difference]: Finished difference Result 26054 states and 131462 transitions. [2022-11-20 10:59:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:59:55,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 10:59:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:55,155 INFO L225 Difference]: With dead ends: 26054 [2022-11-20 10:59:55,155 INFO L226 Difference]: Without dead ends: 26054 [2022-11-20 10:59:55,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:59:55,156 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:55,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 25 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 61 Unchecked, 0.7s Time] [2022-11-20 10:59:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26054 states. [2022-11-20 10:59:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26054 to 25748. [2022-11-20 10:59:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25748 states, 25739 states have (on average 5.060802672986519) internal successors, (130260), 25747 states have internal predecessors, (130260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25748 states to 25748 states and 130260 transitions. [2022-11-20 10:59:56,037 INFO L78 Accepts]: Start accepts. Automaton has 25748 states and 130260 transitions. Word has length 14 [2022-11-20 10:59:56,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:56,037 INFO L495 AbstractCegarLoop]: Abstraction has 25748 states and 130260 transitions. [2022-11-20 10:59:56,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 10:59:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25748 states and 130260 transitions. [2022-11-20 10:59:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:56,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:56,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:56,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:56,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:56,244 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash 991465455, now seen corresponding path program 8 times [2022-11-20 10:59:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:56,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127629246] [2022-11-20 10:59:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:56,245 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 [2022-11-20 10:59:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:56,246 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:56,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-20 10:59:56,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:56,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:59:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:56,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:59:56,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:59:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:57,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:59:57,650 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:57,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127629246] [2022-11-20 10:59:57,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127629246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:57,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:57,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:59:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194910495] [2022-11-20 10:59:57,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:57,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:59:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:59:57,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:59:57,651 INFO L87 Difference]: Start difference. First operand 25748 states and 130260 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:58,666 INFO L93 Difference]: Finished difference Result 26133 states and 131851 transitions. [2022-11-20 10:59:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:59:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 10:59:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:58,768 INFO L225 Difference]: With dead ends: 26133 [2022-11-20 10:59:58,768 INFO L226 Difference]: Without dead ends: 26133 [2022-11-20 10:59:58,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:59:58,769 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:58,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-11-20 10:59:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26133 states. [2022-11-20 10:59:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26133 to 25798. [2022-11-20 10:59:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25798 states, 25789 states have (on average 5.059443948970491) internal successors, (130478), 25797 states have internal predecessors, (130478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25798 states to 25798 states and 130478 transitions. [2022-11-20 10:59:59,717 INFO L78 Accepts]: Start accepts. Automaton has 25798 states and 130478 transitions. Word has length 14 [2022-11-20 10:59:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:59,718 INFO L495 AbstractCegarLoop]: Abstraction has 25798 states and 130478 transitions. [2022-11-20 10:59:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 10:59:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 25798 states and 130478 transitions. [2022-11-20 10:59:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:59:59,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:59,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:59,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:59,924 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:59:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 974091195, now seen corresponding path program 9 times [2022-11-20 10:59:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:59,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819938157] [2022-11-20 10:59:59,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:59,925 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 [2022-11-20 10:59:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:59,926 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 10:59:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-20 11:00:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:00:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:00:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:00,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:00:00,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:00:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:00:00,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:00:01,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:00:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819938157] [2022-11-20 11:00:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819938157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:01,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:00:01,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 11:00:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809556665] [2022-11-20 11:00:01,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:00:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:00:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:00:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:00:01,337 INFO L87 Difference]: Start difference. First operand 25798 states and 130478 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 11:00:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:02,116 INFO L93 Difference]: Finished difference Result 26083 states and 131654 transitions. [2022-11-20 11:00:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:00:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 11:00:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:02,218 INFO L225 Difference]: With dead ends: 26083 [2022-11-20 11:00:02,218 INFO L226 Difference]: Without dead ends: 26083 [2022-11-20 11:00:02,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:00:02,219 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:02,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 35 Unchecked, 0.6s Time] [2022-11-20 11:00:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2022-11-20 11:00:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25782. [2022-11-20 11:00:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25782 states, 25773 states have (on average 5.0587048461568305) internal successors, (130378), 25781 states have internal predecessors, (130378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25782 states to 25782 states and 130378 transitions. [2022-11-20 11:00:03,360 INFO L78 Accepts]: Start accepts. Automaton has 25782 states and 130378 transitions. Word has length 14 [2022-11-20 11:00:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:03,360 INFO L495 AbstractCegarLoop]: Abstraction has 25782 states and 130378 transitions. [2022-11-20 11:00:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 11:00:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25782 states and 130378 transitions. [2022-11-20 11:00:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:00:03,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:03,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:03,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-20 11:00:03,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:00:03,568 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:00:03,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash 830266985, now seen corresponding path program 1 times [2022-11-20 11:00:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:00:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638210612] [2022-11-20 11:00:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:03,569 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 [2022-11-20 11:00:03,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:00:03,570 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:00:03,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-20 11:00:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:03,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:00:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:04,055 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:00:04,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:00:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:04,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:00:04,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:00:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638210612] [2022-11-20 11:00:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638210612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:04,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:04,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:00:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904033883] [2022-11-20 11:00:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:00:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:00:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:00:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:00:04,350 INFO L87 Difference]: Start difference. First operand 25782 states and 130378 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-20 11:00:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:05,020 INFO L93 Difference]: Finished difference Result 25884 states and 130782 transitions. [2022-11-20 11:00:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:00:05,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 11:00:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:05,134 INFO L225 Difference]: With dead ends: 25884 [2022-11-20 11:00:05,134 INFO L226 Difference]: Without dead ends: 25884 [2022-11-20 11:00:05,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:00:05,135 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:05,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-20 11:00:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25884 states. [2022-11-20 11:00:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25884 to 25781. [2022-11-20 11:00:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25781 states, 25772 states have (on average 5.058745925810958) internal successors, (130374), 25780 states have internal predecessors, (130374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25781 states to 25781 states and 130374 transitions. [2022-11-20 11:00:06,130 INFO L78 Accepts]: Start accepts. Automaton has 25781 states and 130374 transitions. Word has length 14 [2022-11-20 11:00:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:06,131 INFO L495 AbstractCegarLoop]: Abstraction has 25781 states and 130374 transitions. [2022-11-20 11:00:06,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25781 states and 130374 transitions. [2022-11-20 11:00:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:00:06,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:06,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:06,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:06,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:00:06,338 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:00:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash 831313483, now seen corresponding path program 1 times [2022-11-20 11:00:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:00:06,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262962067] [2022-11-20 11:00:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:00:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:00:06,340 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:00:06,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-20 11:00:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:00:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:06,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:00:06,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:00:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:07,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:00:07,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:00:07,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262962067] [2022-11-20 11:00:07,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262962067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:07,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:07,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:00:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931868490] [2022-11-20 11:00:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:00:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:00:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:00:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:00:07,134 INFO L87 Difference]: Start difference. First operand 25781 states and 130374 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-20 11:00:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:07,452 INFO L93 Difference]: Finished difference Result 25788 states and 130397 transitions. [2022-11-20 11:00:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:00:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 11:00:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:07,552 INFO L225 Difference]: With dead ends: 25788 [2022-11-20 11:00:07,552 INFO L226 Difference]: Without dead ends: 25788 [2022-11-20 11:00:07,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:00:07,552 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:07,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 11:00:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2022-11-20 11:00:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 25781. [2022-11-20 11:00:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25781 states, 25772 states have (on average 5.058745925810958) internal successors, (130374), 25780 states have internal predecessors, (130374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25781 states to 25781 states and 130374 transitions. [2022-11-20 11:00:08,469 INFO L78 Accepts]: Start accepts. Automaton has 25781 states and 130374 transitions. Word has length 14 [2022-11-20 11:00:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:08,469 INFO L495 AbstractCegarLoop]: Abstraction has 25781 states and 130374 transitions. [2022-11-20 11:00:08,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:00:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 25781 states and 130374 transitions. [2022-11-20 11:00:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:00:08,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:08,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:08,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-20 11:00:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:00:08,675 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 11:00:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 831207215, now seen corresponding path program 2 times [2022-11-20 11:00:08,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:00:08,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110395178] [2022-11-20 11:00:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:08,676 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 [2022-11-20 11:00:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:00:08,677 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 11:00:08,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1042b81a-e11f-4dc0-b200-a64a5da71036/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-20 11:00:09,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:00:09,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:09,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:00:09,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:09,280 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:00:09,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:00:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:09,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:00:09,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:00:09,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110395178] [2022-11-20 11:00:09,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110395178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:00:09,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:00:09,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:00:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487755101] [2022-11-20 11:00:09,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:00:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:00:09,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:00:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:00:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:00:09,560 INFO L87 Difference]: Start difference. First operand 25781 states and 130374 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-20 11:00:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:10,253 INFO L93 Difference]: Finished difference Result 25819 states and 130537 transitions. [2022-11-20 11:00:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:00:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-20 11:00:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:10,399 INFO L225 Difference]: With dead ends: 25819 [2022-11-20 11:00:10,399 INFO L226 Difference]: Without dead ends: 25819 [2022-11-20 11:00:10,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:00:10,399 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:10,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 11:00:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25819 states.