./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/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_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/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_b594d71b-c7a8-4a03-a477-702a01e4da98/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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:24:36,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:24:36,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:24:36,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:24:36,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:24:36,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:24:36,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:24:36,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:24:36,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:24:36,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:24:36,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:24:36,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:24:36,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:24:36,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:24:36,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:24:36,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:24:36,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:24:36,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:24:36,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:24:36,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:24:36,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:24:36,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:24:36,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:24:36,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:24:36,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:24:36,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:24:36,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:24:36,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:24:36,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:24:36,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:24:36,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:24:36,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:24:36,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:24:36,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:24:36,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:24:36,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:24:36,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:24:36,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:24:36,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:24:36,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:24:36,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:24:36,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:24:36,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:24:36,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:24:36,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:24:36,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:24:36,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:24:36,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:24:36,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:24:36,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:24:36,894 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:24:36,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:24:36,894 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:24:36,894 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:24:36,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:24:36,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:24:36,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:24:36,895 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:24:36,895 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:24:36,895 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:24:36,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:24:36,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:24:36,896 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:24:36,896 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:24:36,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:24:36,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:24:36,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:24:36,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:24:36,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:24:36,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:24:36,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:24:36,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:24:36,898 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_b594d71b-c7a8-4a03-a477-702a01e4da98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-11-20 12:24:37,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:24:37,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:24:37,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:24:37,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:24:37,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:24:37,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-20 12:24:40,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:24:40,636 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:24:40,637 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-20 12:24:40,644 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/b394e2f6d/aac3ac61d38a4fad97338ccebf5d56fa/FLAG69eccdcb2 [2022-11-20 12:24:40,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/b394e2f6d/aac3ac61d38a4fad97338ccebf5d56fa [2022-11-20 12:24:40,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:24:40,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:24:40,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:24:40,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:24:40,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:24:40,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:24:40" (1/1) ... [2022-11-20 12:24:40,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1307cf32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:40, skipping insertion in model container [2022-11-20 12:24:40,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:24:40" (1/1) ... [2022-11-20 12:24:40,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:24:40,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:24:40,953 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_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-20 12:24:40,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:24:40,979 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 12:24:40,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ee12394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:40, skipping insertion in model container [2022-11-20 12:24:40,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:24:40,980 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 12:24:40,982 INFO L158 Benchmark]: Toolchain (without parser) took 311.89ms. Allocated memory is still 151.0MB. Free memory was 117.7MB in the beginning and 118.8MB in the end (delta: -1.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 12:24:40,982 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 151.0MB. Free memory was 120.2MB in the beginning and 120.1MB in the end (delta: 76.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:24:40,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.27ms. Allocated memory is still 151.0MB. Free memory was 117.3MB in the beginning and 118.8MB in the end (delta: -1.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 12:24:40,985 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 151.0MB. Free memory was 120.2MB in the beginning and 120.1MB in the end (delta: 76.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.27ms. Allocated memory is still 151.0MB. Free memory was 117.3MB in the beginning and 118.8MB in the end (delta: -1.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 153]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/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_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/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_b594d71b-c7a8-4a03-a477-702a01e4da98/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 d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:24:43,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:24:43,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:24:43,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:24:43,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:24:43,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:24:43,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:24:43,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:24:43,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:24:43,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:24:43,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:24:43,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:24:43,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:24:43,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:24:43,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:24:43,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:24:43,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:24:43,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:24:43,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:24:43,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:24:43,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:24:43,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:24:43,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:24:43,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:24:43,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:24:43,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:24:43,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:24:43,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:24:43,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:24:43,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:24:43,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:24:43,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:24:43,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:24:43,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:24:43,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:24:43,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:24:43,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:24:43,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:24:43,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:24:43,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:24:43,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:24:43,609 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 12:24:43,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:24:43,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:24:43,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:24:43,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:24:43,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:24:43,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:24:43,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:24:43,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:24:43,668 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:24:43,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:24:43,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:24:43,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:24:43,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:24:43,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:24:43,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:24:43,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:24:43,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:24:43,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:24:43,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:24:43,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:24:43,672 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 12:24:43,672 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 12:24:43,673 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:24:43,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:24:43,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:24:43,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:24:43,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:24:43,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:24:43,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:24:43,675 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:24:43,675 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 12:24:43,675 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 12:24:43,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 12:24:43,676 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_b594d71b-c7a8-4a03-a477-702a01e4da98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-11-20 12:24:44,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:24:44,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:24:44,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:24:44,175 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:24:44,176 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:24:44,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-20 12:24:47,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:24:47,851 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:24:47,852 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-20 12:24:47,859 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/cd6800a49/336c051ede1446df85b8113d46054b9f/FLAG9f6f47024 [2022-11-20 12:24:47,877 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/data/cd6800a49/336c051ede1446df85b8113d46054b9f [2022-11-20 12:24:47,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:24:47,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:24:47,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:24:47,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:24:47,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:24:47,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:24:47" (1/1) ... [2022-11-20 12:24:47,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45dd1147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:47, skipping insertion in model container [2022-11-20 12:24:47,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:24:47" (1/1) ... [2022-11-20 12:24:47,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:24:47,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:24:48,138 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_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-20 12:24:48,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:24:48,179 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 12:24:48,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:24:48,221 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_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-20 12:24:48,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:24:48,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:24:48,283 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_b594d71b-c7a8-4a03-a477-702a01e4da98/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-20 12:24:48,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:24:48,307 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:24:48,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48 WrapperNode [2022-11-20 12:24:48,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:24:48,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:24:48,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:24:48,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:24:48,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,361 INFO L138 Inliner]: procedures = 29, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 233 [2022-11-20 12:24:48,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:24:48,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:24:48,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:24:48,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:24:48,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,470 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:24:48,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:24:48,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:24:48,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:24:48,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (1/1) ... [2022-11-20 12:24:48,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:24:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:24:48,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:24:48,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:24:48,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:24:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 12:24:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:24:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 12:24:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:24:48,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:24:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:24:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:24:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 12:24:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 12:24:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 12:24:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 12:24:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:24:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:24:48,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:24:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:24:48,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:24:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:24:48,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 12:24:48,592 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 12:24:48,773 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:24:48,776 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:24:49,627 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:24:49,862 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:24:49,862 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 12:24:49,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:24:49 BoogieIcfgContainer [2022-11-20 12:24:49,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:24:49,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:24:49,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:24:49,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:24:49,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:24:47" (1/3) ... [2022-11-20 12:24:49,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674c90b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:24:49, skipping insertion in model container [2022-11-20 12:24:49,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:24:48" (2/3) ... [2022-11-20 12:24:49,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674c90b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:24:49, skipping insertion in model container [2022-11-20 12:24:49,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:24:49" (3/3) ... [2022-11-20 12:24:49,874 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2022-11-20 12:24:49,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:24:49,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-20 12:24:49,896 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:24:50,071 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-20 12:24:50,126 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 12:24:50,159 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 226 transitions, 496 flow [2022-11-20 12:24:50,162 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 226 transitions, 496 flow [2022-11-20 12:24:50,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 226 transitions, 496 flow [2022-11-20 12:24:50,347 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2022-11-20 12:24:50,347 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 12:24:50,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 209 events. 14/209 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 270 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 172. Up to 3 conditions per place. [2022-11-20 12:24:50,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2022-11-20 12:25:16,264 INFO L134 LiptonReduction]: Checked pairs total: 17008 [2022-11-20 12:25:16,264 INFO L136 LiptonReduction]: Total number of compositions: 208 [2022-11-20 12:25:16,273 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 86 places, 79 transitions, 202 flow [2022-11-20 12:25:16,539 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:16,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:25:16,575 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;@16acb94a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:25:16,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-11-20 12:25:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:25:16,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:16,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:25:16,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:16,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash 36151, now seen corresponding path program 1 times [2022-11-20 12:25:16,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:16,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390909544] [2022-11-20 12:25:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:16,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:16,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:25:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:16,961 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:25:16,962 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:25:16,988 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 12:25:16,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:16,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390909544] [2022-11-20 12:25:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390909544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:16,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:16,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454839151] [2022-11-20 12:25:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:16,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:17,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:17,101 INFO L87 Difference]: Start difference. First operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:17,516 INFO L93 Difference]: Finished difference Result 4370 states and 17374 transitions. [2022-11-20 12:25:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:17,553 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 12:25:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:17,628 INFO L225 Difference]: With dead ends: 4370 [2022-11-20 12:25:17,628 INFO L226 Difference]: Without dead ends: 4370 [2022-11-20 12:25:17,629 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 12:25:17,633 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:17,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2022-11-20 12:25:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4370. [2022-11-20 12:25:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 3910 states have (on average 4.443478260869565) internal successors, (17374), 4369 states have internal predecessors, (17374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 17374 transitions. [2022-11-20 12:25:18,203 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 17374 transitions. Word has length 2 [2022-11-20 12:25:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:18,207 INFO L495 AbstractCegarLoop]: Abstraction has 4370 states and 17374 transitions. [2022-11-20 12:25:18,208 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 12:25:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 17374 transitions. [2022-11-20 12:25:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:25:18,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:18,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:25:18,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:18,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:18,424 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:18,425 INFO L85 PathProgramCache]: Analyzing trace with hash 36152, now seen corresponding path program 1 times [2022-11-20 12:25:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:18,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534626139] [2022-11-20 12:25:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:18,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:18,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:18,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:25:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:18,706 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:25:18,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:25:18,748 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 12:25:18,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:18,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:18,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534626139] [2022-11-20 12:25:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534626139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:18,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:18,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280529229] [2022-11-20 12:25:18,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:18,753 INFO L87 Difference]: Start difference. First operand 4370 states and 17374 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:19,496 INFO L93 Difference]: Finished difference Result 4400 states and 17446 transitions. [2022-11-20 12:25:19,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:19,497 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 12:25:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:19,545 INFO L225 Difference]: With dead ends: 4400 [2022-11-20 12:25:19,545 INFO L226 Difference]: Without dead ends: 4400 [2022-11-20 12:25:19,545 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 12:25:19,553 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:19,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:25:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2022-11-20 12:25:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4371. [2022-11-20 12:25:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.443364868320122) internal successors, (17378), 4370 states have internal predecessors, (17378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17378 transitions. [2022-11-20 12:25:20,061 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17378 transitions. Word has length 2 [2022-11-20 12:25:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:20,061 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17378 transitions. [2022-11-20 12:25:20,061 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 12:25:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17378 transitions. [2022-11-20 12:25:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:25:20,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:20,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:25:20,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:20,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:20,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:20,275 INFO L85 PathProgramCache]: Analyzing trace with hash 36300, now seen corresponding path program 1 times [2022-11-20 12:25:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:20,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357748533] [2022-11-20 12:25:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:20,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:20,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:20,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:20,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:25:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:20,412 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 12:25:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-20 12:25:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:25:20,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:20,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:20,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357748533] [2022-11-20 12:25:20,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357748533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:20,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:20,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843320107] [2022-11-20 12:25:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:20,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:20,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:20,472 INFO L87 Difference]: Start difference. First operand 4371 states and 17378 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:20,757 INFO L93 Difference]: Finished difference Result 4371 states and 17377 transitions. [2022-11-20 12:25:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:20,758 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 12:25:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:20,886 INFO L225 Difference]: With dead ends: 4371 [2022-11-20 12:25:20,887 INFO L226 Difference]: Without dead ends: 4371 [2022-11-20 12:25:20,887 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 12:25:20,888 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:20,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 12:25:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-20 12:25:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4371. [2022-11-20 12:25:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.443109179238046) internal successors, (17377), 4370 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17377 transitions. [2022-11-20 12:25:21,113 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17377 transitions. Word has length 2 [2022-11-20 12:25:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:21,113 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17377 transitions. [2022-11-20 12:25:21,114 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 12:25:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17377 transitions. [2022-11-20 12:25:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 12:25:21,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:21,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 12:25:21,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:21,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash 36302, now seen corresponding path program 1 times [2022-11-20 12:25:21,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:21,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155214466] [2022-11-20 12:25:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:21,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:21,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:21,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:25:21,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:21,576 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:25:21,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-20 12:25:21,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:25:21,646 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 12:25:21,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:21,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:21,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155214466] [2022-11-20 12:25:21,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155214466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:21,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:21,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:21,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111782551] [2022-11-20 12:25:21,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:21,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:21,649 INFO L87 Difference]: Start difference. First operand 4371 states and 17377 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:21,952 INFO L93 Difference]: Finished difference Result 4371 states and 17376 transitions. [2022-11-20 12:25:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:21,953 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 12:25:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:21,980 INFO L225 Difference]: With dead ends: 4371 [2022-11-20 12:25:21,980 INFO L226 Difference]: Without dead ends: 4371 [2022-11-20 12:25:21,981 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 12:25:21,983 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:21,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 12:25:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-20 12:25:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4371. [2022-11-20 12:25:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.44285349015597) internal successors, (17376), 4370 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17376 transitions. [2022-11-20 12:25:22,209 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17376 transitions. Word has length 2 [2022-11-20 12:25:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:22,210 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17376 transitions. [2022-11-20 12:25:22,210 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 12:25:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17376 transitions. [2022-11-20 12:25:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:25:22,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:22,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:25:22,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-20 12:25:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:22,423 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1125120, now seen corresponding path program 1 times [2022-11-20 12:25:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:22,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300035997] [2022-11-20 12:25:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:22,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:22,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:22,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:22,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:25:22,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:22,630 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:25:22,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:25:22,738 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 12:25:22,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:23,063 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 12:25:23,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:23,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300035997] [2022-11-20 12:25:23,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300035997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:23,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:25:23,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 12:25:23,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415103802] [2022-11-20 12:25:23,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:23,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:25:23,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:23,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:25:23,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:25:23,066 INFO L87 Difference]: Start difference. First operand 4371 states and 17376 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 12:25:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:24,826 INFO L93 Difference]: Finished difference Result 4456 states and 17591 transitions. [2022-11-20 12:25:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:25:24,827 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 12:25:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:24,863 INFO L225 Difference]: With dead ends: 4456 [2022-11-20 12:25:24,863 INFO L226 Difference]: Without dead ends: 4456 [2022-11-20 12:25:24,863 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 12:25:24,864 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:24,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 36 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 12:25:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2022-11-20 12:25:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4374. [2022-11-20 12:25:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4374 states, 3914 states have (on average 4.442514052120592) internal successors, (17388), 4373 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4374 states to 4374 states and 17388 transitions. [2022-11-20 12:25:25,183 INFO L78 Accepts]: Start accepts. Automaton has 4374 states and 17388 transitions. Word has length 3 [2022-11-20 12:25:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:25,183 INFO L495 AbstractCegarLoop]: Abstraction has 4374 states and 17388 transitions. [2022-11-20 12:25:25,184 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 12:25:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4374 states and 17388 transitions. [2022-11-20 12:25:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:25:25,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:25,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:25:25,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:25,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:25,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1125268, now seen corresponding path program 1 times [2022-11-20 12:25:25,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146806281] [2022-11-20 12:25:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:25,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:25,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:25,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:25,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:25:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:25,554 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 12:25:25,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-20 12:25:25,610 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 12:25:25,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:25,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146806281] [2022-11-20 12:25:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146806281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:25,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:25,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582110831] [2022-11-20 12:25:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:25,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:25,614 INFO L87 Difference]: Start difference. First operand 4374 states and 17388 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:25,818 INFO L93 Difference]: Finished difference Result 4373 states and 17384 transitions. [2022-11-20 12:25:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:25,819 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 12:25:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:25,849 INFO L225 Difference]: With dead ends: 4373 [2022-11-20 12:25:25,850 INFO L226 Difference]: Without dead ends: 4373 [2022-11-20 12:25:25,850 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 12:25:25,851 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:25,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-11-20 12:25:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2022-11-20 12:25:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 4373. [2022-11-20 12:25:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 3914 states have (on average 4.441492079713847) internal successors, (17384), 4372 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 17384 transitions. [2022-11-20 12:25:26,024 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 17384 transitions. Word has length 3 [2022-11-20 12:25:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 4373 states and 17384 transitions. [2022-11-20 12:25:26,025 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 12:25:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 17384 transitions. [2022-11-20 12:25:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 12:25:26,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:26,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 12:25:26,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:26,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1125270, now seen corresponding path program 1 times [2022-11-20 12:25:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634285138] [2022-11-20 12:25:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:26,240 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 12:25:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:26,242 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:26,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:25:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:26,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:26,443 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 12:25:26,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2022-11-20 12:25:26,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 12:25:26,562 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 12:25:26,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:26,728 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 12:25:26,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:26,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634285138] [2022-11-20 12:25:26,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634285138] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:25:26,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:25:26,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-20 12:25:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050328331] [2022-11-20 12:25:26,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:26,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:25:26,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:25:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:25:26,731 INFO L87 Difference]: Start difference. First operand 4373 states and 17384 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 12:25:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:27,815 INFO L93 Difference]: Finished difference Result 5219 states and 20247 transitions. [2022-11-20 12:25:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:27,817 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 12:25:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:27,853 INFO L225 Difference]: With dead ends: 5219 [2022-11-20 12:25:27,853 INFO L226 Difference]: Without dead ends: 5219 [2022-11-20 12:25:27,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:25:27,857 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:27,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 31 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:25:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5219 states. [2022-11-20 12:25:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5219 to 4367. [2022-11-20 12:25:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4367 states, 3909 states have (on average 4.442312611921207) internal successors, (17365), 4366 states have internal predecessors, (17365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4367 states to 4367 states and 17365 transitions. [2022-11-20 12:25:28,051 INFO L78 Accepts]: Start accepts. Automaton has 4367 states and 17365 transitions. Word has length 3 [2022-11-20 12:25:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:28,051 INFO L495 AbstractCegarLoop]: Abstraction has 4367 states and 17365 transitions. [2022-11-20 12:25:28,052 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 12:25:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4367 states and 17365 transitions. [2022-11-20 12:25:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:25:28,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:28,053 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 12:25:28,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:28,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:28,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -836911304, now seen corresponding path program 2 times [2022-11-20 12:25:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262349264] [2022-11-20 12:25:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:25:28,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:28,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:28,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:28,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:25:28,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:25:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:25:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:28,465 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:25:28,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:25:28,669 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 12:25:28,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:29,482 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 12:25:29,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:29,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262349264] [2022-11-20 12:25:29,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262349264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:29,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:25:29,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 12:25:29,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656168903] [2022-11-20 12:25:29,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:29,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:25:29,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:29,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:25:29,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:25:29,485 INFO L87 Difference]: Start difference. First operand 4367 states and 17365 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 12:25:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:34,332 INFO L93 Difference]: Finished difference Result 4597 states and 17921 transitions. [2022-11-20 12:25:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:25:34,333 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 12:25:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:34,364 INFO L225 Difference]: With dead ends: 4597 [2022-11-20 12:25:34,364 INFO L226 Difference]: Without dead ends: 4597 [2022-11-20 12:25:34,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:25:34,365 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 474 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:34,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 100 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 12:25:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2022-11-20 12:25:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 4373. [2022-11-20 12:25:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 3915 states have (on average 4.438569604086846) internal successors, (17377), 4372 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 17377 transitions. [2022-11-20 12:25:34,579 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 17377 transitions. Word has length 6 [2022-11-20 12:25:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:34,580 INFO L495 AbstractCegarLoop]: Abstraction has 4373 states and 17377 transitions. [2022-11-20 12:25:34,580 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 12:25:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 17377 transitions. [2022-11-20 12:25:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:25:34,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:34,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:25:34,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:34,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:34,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:34,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:34,795 INFO L85 PathProgramCache]: Analyzing trace with hash -807809780, now seen corresponding path program 1 times [2022-11-20 12:25:34,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673109453] [2022-11-20 12:25:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:34,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:34,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:34,798 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:34,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:34,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:25:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:34,961 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 12:25:34,962 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-20 12:25:34,998 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 12:25:34,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:34,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:34,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673109453] [2022-11-20 12:25:34,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673109453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:34,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:34,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103016126] [2022-11-20 12:25:34,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:35,000 INFO L87 Difference]: Start difference. First operand 4373 states and 17377 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 12:25:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:35,358 INFO L93 Difference]: Finished difference Result 4260 states and 16928 transitions. [2022-11-20 12:25:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:35,358 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 12:25:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:35,378 INFO L225 Difference]: With dead ends: 4260 [2022-11-20 12:25:35,379 INFO L226 Difference]: Without dead ends: 4260 [2022-11-20 12:25:35,379 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 12:25:35,380 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:35,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 8 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-11-20 12:25:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 4224. [2022-11-20 12:25:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 3806 states have (on average 4.428796636889122) internal successors, (16856), 4223 states have internal predecessors, (16856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 16856 transitions. [2022-11-20 12:25:35,629 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 16856 transitions. Word has length 6 [2022-11-20 12:25:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:35,629 INFO L495 AbstractCegarLoop]: Abstraction has 4224 states and 16856 transitions. [2022-11-20 12:25:35,629 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 12:25:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 16856 transitions. [2022-11-20 12:25:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:25:35,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:35,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:25:35,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-20 12:25:35,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:35,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -807809779, now seen corresponding path program 1 times [2022-11-20 12:25:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536947444] [2022-11-20 12:25:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:35,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:35,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:35,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 12:25:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:35,985 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 12:25:35,985 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-20 12:25:35,997 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 42 treesize of output 38 [2022-11-20 12:25:36,042 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 12:25:36,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:36,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536947444] [2022-11-20 12:25:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536947444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:36,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:36,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:25:36,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981319833] [2022-11-20 12:25:36,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:36,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:36,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:36,045 INFO L87 Difference]: Start difference. First operand 4224 states and 16856 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 12:25:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:36,286 INFO L93 Difference]: Finished difference Result 4052 states and 16271 transitions. [2022-11-20 12:25:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:36,287 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 12:25:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:36,302 INFO L225 Difference]: With dead ends: 4052 [2022-11-20 12:25:36,302 INFO L226 Difference]: Without dead ends: 4052 [2022-11-20 12:25:36,303 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 12:25:36,303 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:36,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:25:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2022-11-20 12:25:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 4052. [2022-11-20 12:25:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 3678 states have (on average 4.4238716693855356) internal successors, (16271), 4051 states have internal predecessors, (16271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 16271 transitions. [2022-11-20 12:25:36,435 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 16271 transitions. Word has length 6 [2022-11-20 12:25:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:36,435 INFO L495 AbstractCegarLoop]: Abstraction has 4052 states and 16271 transitions. [2022-11-20 12:25:36,435 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 12:25:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 16271 transitions. [2022-11-20 12:25:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:25:36,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:36,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:36,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-20 12:25:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:36,649 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash 721256862, now seen corresponding path program 1 times [2022-11-20 12:25:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:36,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623500842] [2022-11-20 12:25:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:36,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:36,651 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:36,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:25:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:36,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 12:25:36,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 12:25:36,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 12:25:36,818 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 12:25:36,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:36,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:36,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623500842] [2022-11-20 12:25:36,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623500842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:36,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:36,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:25:36,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314555617] [2022-11-20 12:25:36,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:36,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:36,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:36,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:36,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:36,821 INFO L87 Difference]: Start difference. First operand 4052 states and 16271 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:37,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:37,138 INFO L93 Difference]: Finished difference Result 3428 states and 13433 transitions. [2022-11-20 12:25:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:25:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:37,151 INFO L225 Difference]: With dead ends: 3428 [2022-11-20 12:25:37,151 INFO L226 Difference]: Without dead ends: 3428 [2022-11-20 12:25:37,151 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 12:25:37,152 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:37,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 11 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-11-20 12:25:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 3428. [2022-11-20 12:25:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3144 states have (on average 4.272582697201018) internal successors, (13433), 3427 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 13433 transitions. [2022-11-20 12:25:37,272 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 13433 transitions. Word has length 7 [2022-11-20 12:25:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 13433 transitions. [2022-11-20 12:25:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 13433 transitions. [2022-11-20 12:25:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:25:37,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:37,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:37,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:37,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:37,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:37,493 INFO L85 PathProgramCache]: Analyzing trace with hash 721256863, now seen corresponding path program 1 times [2022-11-20 12:25:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875298375] [2022-11-20 12:25:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:37,495 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:37,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:37,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 12:25:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:37,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:25:37,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 12:25:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:37,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:25:37,663 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:25:37,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:25:37,686 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 12:25:37,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:37,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875298375] [2022-11-20 12:25:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875298375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:37,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:25:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291976810] [2022-11-20 12:25:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:25:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:25:37,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:25:37,690 INFO L87 Difference]: Start difference. First operand 3428 states and 13433 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:38,119 INFO L93 Difference]: Finished difference Result 2804 states and 10595 transitions. [2022-11-20 12:25:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:25:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:25:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:38,136 INFO L225 Difference]: With dead ends: 2804 [2022-11-20 12:25:38,137 INFO L226 Difference]: Without dead ends: 2804 [2022-11-20 12:25:38,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:25:38,138 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:38,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 12 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:25:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-11-20 12:25:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2022-11-20 12:25:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2610 states have (on average 4.059386973180077) internal successors, (10595), 2803 states have internal predecessors, (10595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 10595 transitions. [2022-11-20 12:25:38,237 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 10595 transitions. Word has length 7 [2022-11-20 12:25:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:38,237 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 10595 transitions. [2022-11-20 12:25:38,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 10595 transitions. [2022-11-20 12:25:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:25:38,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:38,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:38,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:25:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:38,439 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1083909404, now seen corresponding path program 1 times [2022-11-20 12:25:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746867533] [2022-11-20 12:25:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:38,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:38,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:38,441 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:25:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:38,552 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 12:25:38,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:38,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:38,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746867533] [2022-11-20 12:25:38,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746867533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:38,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:38,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:25:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140116939] [2022-11-20 12:25:38,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:38,556 INFO L87 Difference]: Start difference. First operand 2804 states and 10595 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 12:25:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:38,858 INFO L93 Difference]: Finished difference Result 2266 states and 8262 transitions. [2022-11-20 12:25:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:38,859 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 12:25:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:38,867 INFO L225 Difference]: With dead ends: 2266 [2022-11-20 12:25:38,868 INFO L226 Difference]: Without dead ends: 2266 [2022-11-20 12:25:38,868 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 12:25:38,870 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:38,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 8 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2022-11-20 12:25:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2239. [2022-11-20 12:25:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2105 states have (on average 3.9026128266033253) internal successors, (8215), 2238 states have internal predecessors, (8215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 8215 transitions. [2022-11-20 12:25:38,964 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 8215 transitions. Word has length 8 [2022-11-20 12:25:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:38,965 INFO L495 AbstractCegarLoop]: Abstraction has 2239 states and 8215 transitions. [2022-11-20 12:25:38,965 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 12:25:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 8215 transitions. [2022-11-20 12:25:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 12:25:38,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:38,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:38,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:39,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:39,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -663053818, now seen corresponding path program 1 times [2022-11-20 12:25:39,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573174479] [2022-11-20 12:25:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:39,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:39,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:25:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:39,361 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:25:39,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:25:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:25:39,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:25:39,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:25:39,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:25:39,504 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 12:25:39,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:39,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573174479] [2022-11-20 12:25:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573174479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:39,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:39,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:25:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465973650] [2022-11-20 12:25:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:39,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:25:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:25:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:39,508 INFO L87 Difference]: Start difference. First operand 2239 states and 8215 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 12:25:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:39,823 INFO L93 Difference]: Finished difference Result 1696 states and 5867 transitions. [2022-11-20 12:25:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:25:39,824 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 12:25:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:39,830 INFO L225 Difference]: With dead ends: 1696 [2022-11-20 12:25:39,830 INFO L226 Difference]: Without dead ends: 1696 [2022-11-20 12:25:39,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:39,831 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 168 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:39,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 7 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-11-20 12:25:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1669. [2022-11-20 12:25:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1598 states have (on average 3.642052565707134) internal successors, (5820), 1668 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5820 transitions. [2022-11-20 12:25:39,890 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5820 transitions. Word has length 9 [2022-11-20 12:25:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:39,890 INFO L495 AbstractCegarLoop]: Abstraction has 1669 states and 5820 transitions. [2022-11-20 12:25:39,891 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 12:25:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5820 transitions. [2022-11-20 12:25:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 12:25:39,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:39,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:39,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:40,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:40,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash -758549968, now seen corresponding path program 1 times [2022-11-20 12:25:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:40,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277838529] [2022-11-20 12:25:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:40,095 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:40,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:25:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:40,250 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:25:40,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:25:40,289 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 12:25:40,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:40,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277838529] [2022-11-20 12:25:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277838529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:40,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:40,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:25:40,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179677815] [2022-11-20 12:25:40,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:40,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:25:40,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:25:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:25:40,292 INFO L87 Difference]: Start difference. First operand 1669 states and 5820 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:40,700 INFO L93 Difference]: Finished difference Result 1133 states and 3781 transitions. [2022-11-20 12:25:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:25:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 12:25:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:40,706 INFO L225 Difference]: With dead ends: 1133 [2022-11-20 12:25:40,706 INFO L226 Difference]: Without dead ends: 1133 [2022-11-20 12:25:40,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:40,708 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 9 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:25:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-11-20 12:25:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1107. [2022-11-20 12:25:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1074 states have (on average 3.492551210428305) internal successors, (3751), 1106 states have internal predecessors, (3751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 3751 transitions. [2022-11-20 12:25:40,750 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 3751 transitions. Word has length 9 [2022-11-20 12:25:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:40,751 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 3751 transitions. [2022-11-20 12:25:40,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:40,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 3751 transitions. [2022-11-20 12:25:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 12:25:40,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:40,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:40,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:40,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:40,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -758549966, now seen corresponding path program 1 times [2022-11-20 12:25:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:40,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868628781] [2022-11-20 12:25:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:40,967 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:25:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:41,169 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:25:41,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:25:41,384 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 12:25:41,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:41,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868628781] [2022-11-20 12:25:41,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868628781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:41,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:41,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:25:41,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101150913] [2022-11-20 12:25:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:41,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:25:41,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:25:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:41,387 INFO L87 Difference]: Start difference. First operand 1107 states and 3751 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:42,018 INFO L93 Difference]: Finished difference Result 1111 states and 3761 transitions. [2022-11-20 12:25:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:25:42,019 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 12:25:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:42,023 INFO L225 Difference]: With dead ends: 1111 [2022-11-20 12:25:42,023 INFO L226 Difference]: Without dead ends: 1111 [2022-11-20 12:25:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:25:42,024 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:42,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:25:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-11-20 12:25:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1109. [2022-11-20 12:25:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1076 states have (on average 3.492565055762082) internal successors, (3758), 1108 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3758 transitions. [2022-11-20 12:25:42,057 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3758 transitions. Word has length 9 [2022-11-20 12:25:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:42,057 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 3758 transitions. [2022-11-20 12:25:42,058 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 12:25:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3758 transitions. [2022-11-20 12:25:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:25:42,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:42,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:42,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:25:42,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:42,263 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 920164938, now seen corresponding path program 1 times [2022-11-20 12:25:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111437359] [2022-11-20 12:25:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:42,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:42,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:42,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:25:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:42,509 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 12:25:42,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:42,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:42,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111437359] [2022-11-20 12:25:42,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111437359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:42,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:42,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:25:42,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795237288] [2022-11-20 12:25:42,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:42,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:25:42,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:42,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:25:42,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:42,512 INFO L87 Difference]: Start difference. First operand 1109 states and 3758 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:43,246 INFO L93 Difference]: Finished difference Result 1999 states and 6587 transitions. [2022-11-20 12:25:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:25:43,247 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 12:25:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:43,253 INFO L225 Difference]: With dead ends: 1999 [2022-11-20 12:25:43,253 INFO L226 Difference]: Without dead ends: 1999 [2022-11-20 12:25:43,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:25:43,254 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:43,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 67 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:25:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2022-11-20 12:25:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1815. [2022-11-20 12:25:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1782 states have (on average 3.435465768799102) internal successors, (6122), 1814 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 6122 transitions. [2022-11-20 12:25:43,304 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 6122 transitions. Word has length 10 [2022-11-20 12:25:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:43,305 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 6122 transitions. [2022-11-20 12:25:43,305 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 12:25:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 6122 transitions. [2022-11-20 12:25:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:25:43,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:43,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:43,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:43,510 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -761600690, now seen corresponding path program 1 times [2022-11-20 12:25:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:43,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653946731] [2022-11-20 12:25:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:43,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:43,513 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:43,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:43,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:25:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:43,756 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 12:25:43,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:43,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653946731] [2022-11-20 12:25:43,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653946731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:43,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:43,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:25:43,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28191899] [2022-11-20 12:25:43,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:25:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:25:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:25:43,758 INFO L87 Difference]: Start difference. First operand 1815 states and 6122 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 12:25:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:44,308 INFO L93 Difference]: Finished difference Result 1539 states and 4831 transitions. [2022-11-20 12:25:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:25:44,309 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 12:25:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:44,312 INFO L225 Difference]: With dead ends: 1539 [2022-11-20 12:25:44,312 INFO L226 Difference]: Without dead ends: 1539 [2022-11-20 12:25:44,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:25:44,313 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:44,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 58 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:25:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-11-20 12:25:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1501. [2022-11-20 12:25:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1468 states have (on average 3.2568119891008176) internal successors, (4781), 1500 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 4781 transitions. [2022-11-20 12:25:44,387 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 4781 transitions. Word has length 10 [2022-11-20 12:25:44,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:44,388 INFO L495 AbstractCegarLoop]: Abstraction has 1501 states and 4781 transitions. [2022-11-20 12:25:44,388 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 12:25:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 4781 transitions. [2022-11-20 12:25:44,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:25:44,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:44,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:44,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:44,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -193794030, now seen corresponding path program 1 times [2022-11-20 12:25:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520960521] [2022-11-20 12:25:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:44,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:44,604 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:44,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:25:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:44,913 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 12:25:44,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:45,077 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 12:25:45,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:45,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520960521] [2022-11-20 12:25:45,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520960521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:45,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:25:45,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 12:25:45,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139717927] [2022-11-20 12:25:45,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:45,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:25:45,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:45,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:25:45,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:25:45,079 INFO L87 Difference]: Start difference. First operand 1501 states and 4781 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 12:25:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:46,645 INFO L93 Difference]: Finished difference Result 2429 states and 7660 transitions. [2022-11-20 12:25:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:25:46,646 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 12:25:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:46,652 INFO L225 Difference]: With dead ends: 2429 [2022-11-20 12:25:46,652 INFO L226 Difference]: Without dead ends: 2429 [2022-11-20 12:25:46,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:25:46,653 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 460 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:46,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 192 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:25:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2022-11-20 12:25:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2086. [2022-11-20 12:25:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2053 states have (on average 3.3511933755479784) internal successors, (6880), 2085 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 6880 transitions. [2022-11-20 12:25:46,703 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 6880 transitions. Word has length 11 [2022-11-20 12:25:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:46,703 INFO L495 AbstractCegarLoop]: Abstraction has 2086 states and 6880 transitions. [2022-11-20 12:25:46,703 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 12:25:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 6880 transitions. [2022-11-20 12:25:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:25:46,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:46,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:46,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:46,905 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:46,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1875559658, now seen corresponding path program 1 times [2022-11-20 12:25:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:46,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608723236] [2022-11-20 12:25:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:46,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:46,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:46,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:25:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:47,219 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 12:25:47,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:47,368 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 12:25:47,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608723236] [2022-11-20 12:25:47,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608723236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:47,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:25:47,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 12:25:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204480579] [2022-11-20 12:25:47,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:47,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:25:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:25:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:25:47,370 INFO L87 Difference]: Start difference. First operand 2086 states and 6880 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 12:25:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:48,684 INFO L93 Difference]: Finished difference Result 1969 states and 5688 transitions. [2022-11-20 12:25:48,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:25:48,685 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 12:25:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:48,689 INFO L225 Difference]: With dead ends: 1969 [2022-11-20 12:25:48,689 INFO L226 Difference]: Without dead ends: 1969 [2022-11-20 12:25:48,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:25:48,690 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 352 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:48,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 110 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:25:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2022-11-20 12:25:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1475. [2022-11-20 12:25:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1442 states have (on average 3.1248266296809986) internal successors, (4506), 1474 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4506 transitions. [2022-11-20 12:25:48,719 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4506 transitions. Word has length 11 [2022-11-20 12:25:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:48,719 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 4506 transitions. [2022-11-20 12:25:48,720 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 12:25:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4506 transitions. [2022-11-20 12:25:48,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:25:48,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:48,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:48,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:48,921 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2134782740, now seen corresponding path program 1 times [2022-11-20 12:25:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:48,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545018947] [2022-11-20 12:25:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:48,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:48,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:48,924 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:48,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:25:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:49,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 12:25:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:25:49,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:49,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:49,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545018947] [2022-11-20 12:25:49,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545018947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:49,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:49,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:25:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487757884] [2022-11-20 12:25:49,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:49,048 INFO L87 Difference]: Start difference. First operand 1475 states and 4506 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:49,336 INFO L93 Difference]: Finished difference Result 1345 states and 4117 transitions. [2022-11-20 12:25:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 12:25:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:49,341 INFO L225 Difference]: With dead ends: 1345 [2022-11-20 12:25:49,342 INFO L226 Difference]: Without dead ends: 1345 [2022-11-20 12:25:49,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:49,342 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:49,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:25:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-11-20 12:25:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1345. [2022-11-20 12:25:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1320 states have (on average 3.118939393939394) internal successors, (4117), 1344 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4117 transitions. [2022-11-20 12:25:49,376 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4117 transitions. Word has length 11 [2022-11-20 12:25:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:49,376 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 4117 transitions. [2022-11-20 12:25:49,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4117 transitions. [2022-11-20 12:25:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:25:49,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:49,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:25:49,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:25:49,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:49,591 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2134782739, now seen corresponding path program 1 times [2022-11-20 12:25:49,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:49,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587409585] [2022-11-20 12:25:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:25:49,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:49,592 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:49,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:25:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:25:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:49,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:25:49,741 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 12:25:49,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:25:49,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587409585] [2022-11-20 12:25:49,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587409585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:25:49,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:25:49,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:25:49,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523608111] [2022-11-20 12:25:49,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:25:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:25:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:49,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:25:49,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:49,744 INFO L87 Difference]: Start difference. First operand 1345 states and 4117 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:25:50,001 INFO L93 Difference]: Finished difference Result 1215 states and 3728 transitions. [2022-11-20 12:25:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:25:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 12:25:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:25:50,004 INFO L225 Difference]: With dead ends: 1215 [2022-11-20 12:25:50,004 INFO L226 Difference]: Without dead ends: 1215 [2022-11-20 12:25:50,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:25:50,005 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:25:50,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:25:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-11-20 12:25:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2022-11-20 12:25:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1198 states have (on average 3.1118530884808013) internal successors, (3728), 1214 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3728 transitions. [2022-11-20 12:25:50,026 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3728 transitions. Word has length 11 [2022-11-20 12:25:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:25:50,026 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 3728 transitions. [2022-11-20 12:25:50,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:25:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3728 transitions. [2022-11-20 12:25:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:25:50,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:25:50,027 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 12:25:50,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-20 12:25:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:50,228 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:25:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:25:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1180915144, now seen corresponding path program 3 times [2022-11-20 12:25:50,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:25:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152668282] [2022-11-20 12:25:50,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:25:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:25:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:25:50,230 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:25:50,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:25:50,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 12:25:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:25:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:25:50,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:25:50,538 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:25:50,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:25:51,105 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 12:25:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:25:54,261 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 12:25:54,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:25:54,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152668282] [2022-11-20 12:25:54,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152668282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:25:54,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:25:54,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 12:25:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964888699] [2022-11-20 12:25:54,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:25:54,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 12:25:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:25:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 12:25:54,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:25:54,264 INFO L87 Difference]: Start difference. First operand 1215 states and 3728 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:27,095 INFO L93 Difference]: Finished difference Result 1545 states and 4507 transitions. [2022-11-20 12:26:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:26:27,096 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 12:26:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:27,099 INFO L225 Difference]: With dead ends: 1545 [2022-11-20 12:26:27,099 INFO L226 Difference]: Without dead ends: 1545 [2022-11-20 12:26:27,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=454, Invalid=806, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:26:27,100 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1152 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:27,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 204 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-11-20 12:26:27,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-20 12:26:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1227. [2022-11-20 12:26:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1210 states have (on average 3.100826446280992) internal successors, (3752), 1226 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 3752 transitions. [2022-11-20 12:26:27,130 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 3752 transitions. Word has length 12 [2022-11-20 12:26:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:27,130 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 3752 transitions. [2022-11-20 12:26:27,130 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 12:26:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 3752 transitions. [2022-11-20 12:26:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:26:27,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:27,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:27,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:26:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:27,332 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:26:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash -366783670, now seen corresponding path program 2 times [2022-11-20 12:26:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:26:27,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844178003] [2022-11-20 12:26:27,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:26:27,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:26:27,335 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:26:27,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:27,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:26:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:26:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:26:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:27,609 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:26:27,610 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:26:27,692 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:26:27,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:26:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:27,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:26:27,901 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:26:27,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:26:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:26:28,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:26:28,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:26:28,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844178003] [2022-11-20 12:26:28,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844178003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:28,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:28,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:26:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766430343] [2022-11-20 12:26:28,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:28,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:26:28,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:26:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:26:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:26:28,026 INFO L87 Difference]: Start difference. First operand 1227 states and 3752 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:29,401 INFO L93 Difference]: Finished difference Result 1540 states and 4769 transitions. [2022-11-20 12:26:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:26:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 12:26:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:29,406 INFO L225 Difference]: With dead ends: 1540 [2022-11-20 12:26:29,406 INFO L226 Difference]: Without dead ends: 1540 [2022-11-20 12:26:29,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:26:29,407 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 171 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:29,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 18 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:26:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-11-20 12:26:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1370. [2022-11-20 12:26:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1353 states have (on average 3.2453806356245383) internal successors, (4391), 1369 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4391 transitions. [2022-11-20 12:26:29,442 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4391 transitions. Word has length 12 [2022-11-20 12:26:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:29,443 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 4391 transitions. [2022-11-20 12:26:29,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4391 transitions. [2022-11-20 12:26:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:26:29,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:29,444 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:29,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:29,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:29,658 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:26:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash 967809207, now seen corresponding path program 1 times [2022-11-20 12:26:29,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:26:29,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529556272] [2022-11-20 12:26:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:29,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:26:29,661 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:26:29,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:26:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:29,915 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:26:29,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:26:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:26:30,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:26:31,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:26:31,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529556272] [2022-11-20 12:26:31,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529556272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:31,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:26:31,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 12:26:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214930605] [2022-11-20 12:26:31,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:26:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:26:31,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:26:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:26:31,098 INFO L87 Difference]: Start difference. First operand 1370 states and 4391 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 12:26:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:36,945 INFO L93 Difference]: Finished difference Result 1553 states and 4833 transitions. [2022-11-20 12:26:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:26:36,946 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 12 [2022-11-20 12:26:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:36,949 INFO L225 Difference]: With dead ends: 1553 [2022-11-20 12:26:36,950 INFO L226 Difference]: Without dead ends: 1553 [2022-11-20 12:26:36,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:26:36,950 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:36,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 56 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 12:26:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-11-20 12:26:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1380. [2022-11-20 12:26:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1363 states have (on average 3.2487160674981657) internal successors, (4428), 1379 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4428 transitions. [2022-11-20 12:26:36,982 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4428 transitions. Word has length 12 [2022-11-20 12:26:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:36,982 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 4428 transitions. [2022-11-20 12:26:36,982 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 12:26:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4428 transitions. [2022-11-20 12:26:36,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:26:36,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:36,983 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:36,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:37,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:37,197 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:26:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash -2048549298, now seen corresponding path program 2 times [2022-11-20 12:26:37,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:26:37,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636882562] [2022-11-20 12:26:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:26:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:26:37,200 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:26:37,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:37,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:26:37,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:26:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:26:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:37,430 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:26:37,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:26:37,531 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:26:37,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:26:37,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:37,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:26:37,804 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:26:37,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:26:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:26:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:26:38,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:26:38,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:26:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636882562] [2022-11-20 12:26:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636882562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:26:38,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:26:38,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:26:38,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096593509] [2022-11-20 12:26:38,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:26:38,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:26:38,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:26:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:26:38,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:26:38,179 INFO L87 Difference]: Start difference. First operand 1380 states and 4428 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:38,818 INFO L93 Difference]: Finished difference Result 1491 states and 4727 transitions. [2022-11-20 12:26:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:26:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 12:26:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:38,821 INFO L225 Difference]: With dead ends: 1491 [2022-11-20 12:26:38,822 INFO L226 Difference]: Without dead ends: 1491 [2022-11-20 12:26:38,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:26:38,822 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:38,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 97 Unchecked, 0.5s Time] [2022-11-20 12:26:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-11-20 12:26:38,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1446. [2022-11-20 12:26:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1429 states have (on average 3.2351294611616517) internal successors, (4623), 1445 states have internal predecessors, (4623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4623 transitions. [2022-11-20 12:26:38,858 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4623 transitions. Word has length 12 [2022-11-20 12:26:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:38,858 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 4623 transitions. [2022-11-20 12:26:38,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4623 transitions. [2022-11-20 12:26:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:26:38,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:38,860 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:38,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:39,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:26:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash -62690761, now seen corresponding path program 1 times [2022-11-20 12:26:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:26:39,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436561337] [2022-11-20 12:26:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:39,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:39,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:26:39,074 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:26:39,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:26:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:39,315 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:26:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:26:39,422 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 13 treesize of output 9 [2022-11-20 12:26:39,691 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 12:26:39,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:40,071 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 12:26:40,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:26:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436561337] [2022-11-20 12:26:40,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436561337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:40,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:26:40,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 12:26:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177278551] [2022-11-20 12:26:40,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:40,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:26:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:26:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:26:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:26:40,074 INFO L87 Difference]: Start difference. First operand 1446 states and 4623 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 12:26:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:26:44,119 INFO L93 Difference]: Finished difference Result 2466 states and 7623 transitions. [2022-11-20 12:26:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:26:44,120 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 12:26:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:26:44,125 INFO L225 Difference]: With dead ends: 2466 [2022-11-20 12:26:44,126 INFO L226 Difference]: Without dead ends: 2466 [2022-11-20 12:26:44,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:26:44,126 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 440 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:26:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 305 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 12:26:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2022-11-20 12:26:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2170. [2022-11-20 12:26:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2153 states have (on average 3.236414305620065) internal successors, (6968), 2169 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:26:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6968 transitions. [2022-11-20 12:26:44,180 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6968 transitions. Word has length 13 [2022-11-20 12:26:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:26:44,180 INFO L495 AbstractCegarLoop]: Abstraction has 2170 states and 6968 transitions. [2022-11-20 12:26:44,180 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 12:26:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6968 transitions. [2022-11-20 12:26:44,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:26:44,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:26:44,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:26:44,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:26:44,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:26:44,382 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:26:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:26:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2123297100, now seen corresponding path program 1 times [2022-11-20 12:26:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:26:44,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339302007] [2022-11-20 12:26:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:26:44,382 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 12:26:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:26:44,383 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:26:44,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:26:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:26:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:26:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:26:44,678 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:26:44,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:26:44,765 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:26:44,765 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:26:45,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:45,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:26:45,124 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:26:45,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:26:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:26:45,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:26:45,539 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 12:26:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:26:52,096 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:26:56,021 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 12:26:56,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:26:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339302007] [2022-11-20 12:26:56,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339302007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:26:56,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:26:56,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:26:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034281917] [2022-11-20 12:26:56,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:26:56,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:26:56,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:26:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:26:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:26:56,023 INFO L87 Difference]: Start difference. First operand 2170 states and 6968 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 12:27:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:09,250 INFO L93 Difference]: Finished difference Result 2204 states and 7049 transitions. [2022-11-20 12:27:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:27:09,250 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 12:27:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:09,257 INFO L225 Difference]: With dead ends: 2204 [2022-11-20 12:27:09,257 INFO L226 Difference]: Without dead ends: 2204 [2022-11-20 12:27:09,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=75, Invalid=301, Unknown=4, NotChecked=0, Total=380 [2022-11-20 12:27:09,258 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:09,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-11-20 12:27:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2022-11-20 12:27:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2172. [2022-11-20 12:27:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2155 states have (on average 3.234802784222738) internal successors, (6971), 2171 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 6971 transitions. [2022-11-20 12:27:09,308 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 6971 transitions. Word has length 13 [2022-11-20 12:27:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:09,308 INFO L495 AbstractCegarLoop]: Abstraction has 2172 states and 6971 transitions. [2022-11-20 12:27:09,308 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 12:27:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 6971 transitions. [2022-11-20 12:27:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:27:09,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:09,311 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:09,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:27:09,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:09,524 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:27:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:09,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1118856256, now seen corresponding path program 2 times [2022-11-20 12:27:09,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:27:09,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568324954] [2022-11-20 12:27:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:27:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:27:09,527 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:27:09,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:27:09,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:27:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:27:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:09,776 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:27:09,776 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:27:09,879 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:27:09,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:27:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:10,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:27:10,119 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:27:10,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:27:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:10,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:27:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:27:10,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:27:10,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:27:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568324954] [2022-11-20 12:27:10,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568324954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:27:10,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:27:10,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:27:10,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391151964] [2022-11-20 12:27:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:27:10,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:27:10,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:27:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:27:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:27:10,517 INFO L87 Difference]: Start difference. First operand 2172 states and 6971 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:11,294 INFO L93 Difference]: Finished difference Result 2311 states and 7351 transitions. [2022-11-20 12:27:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:27:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:27:11,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:11,300 INFO L225 Difference]: With dead ends: 2311 [2022-11-20 12:27:11,301 INFO L226 Difference]: Without dead ends: 2311 [2022-11-20 12:27:11,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:27:11,302 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:11,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 125 Unchecked, 0.6s Time] [2022-11-20 12:27:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-11-20 12:27:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2166. [2022-11-20 12:27:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2149 states have (on average 3.2382503489995345) internal successors, (6959), 2165 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 6959 transitions. [2022-11-20 12:27:11,356 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 6959 transitions. Word has length 13 [2022-11-20 12:27:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:11,356 INFO L495 AbstractCegarLoop]: Abstraction has 2166 states and 6959 transitions. [2022-11-20 12:27:11,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 6959 transitions. [2022-11-20 12:27:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:27:11,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:11,357 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:11,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:27:11,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:11,558 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:27:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash 919483414, now seen corresponding path program 1 times [2022-11-20 12:27:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:27:11,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042268243] [2022-11-20 12:27:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:27:11,561 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:27:11,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:27:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:27:11,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:11,856 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:27:11,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:27:11,963 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:27:11,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:27:12,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:12,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:27:12,368 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:27:12,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:27:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:12,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:27:12,832 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 12:27:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:15,169 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_~X_0~0.offset))) (and (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_102| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_102|)) (forall ((v_ArrVal_783 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t3~0.base_102| v_ArrVal_783) c_~X_0~0.base))))) (or (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))))) is different from false [2022-11-20 12:27:18,980 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 12:27:18,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:27:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042268243] [2022-11-20 12:27:18,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042268243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:18,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:27:18,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:27:18,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594494449] [2022-11-20 12:27:18,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:18,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:27:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:27:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:27:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2022-11-20 12:27:18,982 INFO L87 Difference]: Start difference. First operand 2166 states and 6959 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 12:27:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:25,707 INFO L93 Difference]: Finished difference Result 2186 states and 7008 transitions. [2022-11-20 12:27:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:27:25,708 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 12:27:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:25,715 INFO L225 Difference]: With dead ends: 2186 [2022-11-20 12:27:25,715 INFO L226 Difference]: Without dead ends: 2186 [2022-11-20 12:27:25,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=64, Invalid=245, Unknown=1, NotChecked=32, Total=342 [2022-11-20 12:27:25,716 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:25,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 84 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 364 Unchecked, 1.0s Time] [2022-11-20 12:27:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2022-11-20 12:27:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2174. [2022-11-20 12:27:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2157 states have (on average 3.238293926750116) internal successors, (6985), 2173 states have internal predecessors, (6985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 6985 transitions. [2022-11-20 12:27:25,762 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 6985 transitions. Word has length 13 [2022-11-20 12:27:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:25,763 INFO L495 AbstractCegarLoop]: Abstraction has 2174 states and 6985 transitions. [2022-11-20 12:27:25,763 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 12:27:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 6985 transitions. [2022-11-20 12:27:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:27:25,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:25,764 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:25,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-20 12:27:25,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:25,965 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:27:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1197989743, now seen corresponding path program 2 times [2022-11-20 12:27:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:27:25,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030579862] [2022-11-20 12:27:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:27:25,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:25,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:27:25,969 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:27:25,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:27:26,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:27:26,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:27:26,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:27:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:26,287 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:27:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:27:26,374 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:27:26,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:27:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:26,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:27:26,957 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:27:26,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:27:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:27:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:27:33,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:27:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030579862] [2022-11-20 12:27:33,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030579862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:27:33,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:27:33,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 12:27:33,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62441495] [2022-11-20 12:27:33,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:27:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:27:33,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:27:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:27:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2022-11-20 12:27:33,381 INFO L87 Difference]: Start difference. First operand 2174 states and 6985 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:49,928 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:27:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:27:50,586 INFO L93 Difference]: Finished difference Result 2497 states and 7822 transitions. [2022-11-20 12:27:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:27:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 12:27:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:27:50,593 INFO L225 Difference]: With dead ends: 2497 [2022-11-20 12:27:50,593 INFO L226 Difference]: Without dead ends: 2497 [2022-11-20 12:27:50,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=102, Invalid=449, Unknown=1, NotChecked=0, Total=552 [2022-11-20 12:27:50,594 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:27:50,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 108 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 690 Unchecked, 1.0s Time] [2022-11-20 12:27:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2022-11-20 12:27:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2183. [2022-11-20 12:27:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2166 states have (on average 3.2359187442289934) internal successors, (7009), 2182 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 7009 transitions. [2022-11-20 12:27:50,632 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 7009 transitions. Word has length 14 [2022-11-20 12:27:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:27:50,632 INFO L495 AbstractCegarLoop]: Abstraction has 2183 states and 7009 transitions. [2022-11-20 12:27:50,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:27:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 7009 transitions. [2022-11-20 12:27:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:27:50,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:27:50,634 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:27:50,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-20 12:27:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:50,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:27:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:27:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1856657362, now seen corresponding path program 1 times [2022-11-20 12:27:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:27:50,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050921221] [2022-11-20 12:27:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:27:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:27:50,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:27:50,836 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:27:50,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:27:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:27:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:27:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:27:51,184 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:27:51,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:27:51,291 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:27:51,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:27:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:51,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:27:51,724 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:27:51,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:27:51,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:27:51,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:27:52,172 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 12:27:52,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:01,003 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 12:28:01,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:28:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050921221] [2022-11-20 12:28:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050921221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:01,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:28:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:28:01,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968221385] [2022-11-20 12:28:01,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:28:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:28:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:28:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:28:01,006 INFO L87 Difference]: Start difference. First operand 2183 states and 7009 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 12:28:21,877 WARN L233 SmtUtils]: Spent 8.62s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:28:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:23,002 INFO L93 Difference]: Finished difference Result 2591 states and 8059 transitions. [2022-11-20 12:28:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:28:23,003 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 12:28:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:23,009 INFO L225 Difference]: With dead ends: 2591 [2022-11-20 12:28:23,009 INFO L226 Difference]: Without dead ends: 2591 [2022-11-20 12:28:23,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:28:23,010 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 145 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 331 Invalid, 0 Unknown, 372 Unchecked, 1.4s Time] [2022-11-20 12:28:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-11-20 12:28:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2217. [2022-11-20 12:28:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2200 states have (on average 3.2277272727272726) internal successors, (7101), 2216 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 7101 transitions. [2022-11-20 12:28:23,052 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 7101 transitions. Word has length 14 [2022-11-20 12:28:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:23,053 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 7101 transitions. [2022-11-20 12:28:23,053 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 12:28:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 7101 transitions. [2022-11-20 12:28:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:28:23,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:23,055 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:23,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:23,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:23,268 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:28:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1230865050, now seen corresponding path program 2 times [2022-11-20 12:28:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:28:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364554068] [2022-11-20 12:28:23,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:23,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:28:23,270 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:28:23,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:28:23,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:28:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:28:23,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:23,533 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:28:23,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:28:23,641 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:28:23,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:28:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:23,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:28:23,915 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:28:23,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:28:24,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:24,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:28:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:28:24,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:28:24,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:28:24,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364554068] [2022-11-20 12:28:24,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364554068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:24,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:24,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:28:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849028938] [2022-11-20 12:28:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:24,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:28:24,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:28:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:28:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:28:24,339 INFO L87 Difference]: Start difference. First operand 2217 states and 7101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:25,185 INFO L93 Difference]: Finished difference Result 2395 states and 7684 transitions. [2022-11-20 12:28:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 12:28:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:25,192 INFO L225 Difference]: With dead ends: 2395 [2022-11-20 12:28:25,192 INFO L226 Difference]: Without dead ends: 2395 [2022-11-20 12:28:25,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:28:25,193 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:25,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 116 Unchecked, 0.7s Time] [2022-11-20 12:28:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2022-11-20 12:28:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2242. [2022-11-20 12:28:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2225 states have (on average 3.2737078651685394) internal successors, (7284), 2241 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 7284 transitions. [2022-11-20 12:28:25,234 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 7284 transitions. Word has length 14 [2022-11-20 12:28:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:25,234 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 7284 transitions. [2022-11-20 12:28:25,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 7284 transitions. [2022-11-20 12:28:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:28:25,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:25,236 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:25,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-20 12:28:25,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:25,436 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:28:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash 324807780, now seen corresponding path program 3 times [2022-11-20 12:28:25,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:28:25,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801440970] [2022-11-20 12:28:25,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:28:25,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:28:25,438 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:28:25,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:28:25,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:28:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:28:25,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:25,697 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:28:25,697 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:28:25,808 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:28:25,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:28:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:26,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:28:26,111 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:28:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:28:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:26,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:28:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:28:26,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:28:26,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:28:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801440970] [2022-11-20 12:28:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801440970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:28:26,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:28:26,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:28:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856346521] [2022-11-20 12:28:26,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:28:26,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:28:26,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:28:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:28:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:28:26,564 INFO L87 Difference]: Start difference. First operand 2242 states and 7284 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:27,394 INFO L93 Difference]: Finished difference Result 2454 states and 7950 transitions. [2022-11-20 12:28:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:28:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 12:28:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:27,401 INFO L225 Difference]: With dead ends: 2454 [2022-11-20 12:28:27,401 INFO L226 Difference]: Without dead ends: 2454 [2022-11-20 12:28:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:28:27,401 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-20 12:28:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-11-20 12:28:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2238. [2022-11-20 12:28:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2221 states have (on average 3.275101305718145) internal successors, (7274), 2237 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 7274 transitions. [2022-11-20 12:28:27,442 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 7274 transitions. Word has length 14 [2022-11-20 12:28:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:27,442 INFO L495 AbstractCegarLoop]: Abstraction has 2238 states and 7274 transitions. [2022-11-20 12:28:27,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 7274 transitions. [2022-11-20 12:28:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 12:28:27,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:27,443 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:27,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-20 12:28:27,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:27,644 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:28:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:27,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1560825496, now seen corresponding path program 1 times [2022-11-20 12:28:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:28:27,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262049431] [2022-11-20 12:28:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:27,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:27,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:28:27,646 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:28:27,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:28:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:28:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:27,985 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:28:27,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:28:28,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:28:28,459 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 12:28:28,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:28,940 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 12:28:28,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:28:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262049431] [2022-11-20 12:28:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262049431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:28,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:28:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 12:28:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391095686] [2022-11-20 12:28:28,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:28,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:28:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:28:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:28:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:28:28,942 INFO L87 Difference]: Start difference. First operand 2238 states and 7274 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 12:28:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:32,422 INFO L93 Difference]: Finished difference Result 2483 states and 7522 transitions. [2022-11-20 12:28:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:28:32,423 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 12:28:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:32,430 INFO L225 Difference]: With dead ends: 2483 [2022-11-20 12:28:32,430 INFO L226 Difference]: Without dead ends: 2483 [2022-11-20 12:28:32,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:28:32,431 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 357 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:32,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 205 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-20 12:28:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2022-11-20 12:28:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2256. [2022-11-20 12:28:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2239 states have (on average 3.1496203662349265) internal successors, (7052), 2255 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7052 transitions. [2022-11-20 12:28:32,476 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7052 transitions. Word has length 14 [2022-11-20 12:28:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:32,476 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 7052 transitions. [2022-11-20 12:28:32,477 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 12:28:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7052 transitions. [2022-11-20 12:28:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:28:32,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:32,478 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:32,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 12:28:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:32,679 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:28:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1695472960, now seen corresponding path program 1 times [2022-11-20 12:28:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:28:32,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643599523] [2022-11-20 12:28:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:28:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:28:32,681 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:28:32,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:28:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:28:32,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:28:32,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:33,021 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:28:33,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:28:33,130 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:28:33,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:28:33,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:33,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:28:33,507 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:28:33,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:28:33,606 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:28:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 12:28:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:34,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:28:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:28:38,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:28:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643599523] [2022-11-20 12:28:38,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643599523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:28:38,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:28:38,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:28:38,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471801978] [2022-11-20 12:28:38,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:28:38,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:28:38,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:28:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:28:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:28:38,016 INFO L87 Difference]: Start difference. First operand 2256 states and 7052 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:28:58,930 INFO L93 Difference]: Finished difference Result 4271 states and 14227 transitions. [2022-11-20 12:28:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:28:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:28:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:28:58,943 INFO L225 Difference]: With dead ends: 4271 [2022-11-20 12:28:58,943 INFO L226 Difference]: Without dead ends: 4271 [2022-11-20 12:28:58,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=151, Invalid=713, Unknown=6, NotChecked=0, Total=870 [2022-11-20 12:28:58,944 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1003 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:28:58,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 321 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 340 Invalid, 0 Unknown, 1003 Unchecked, 2.2s Time] [2022-11-20 12:28:58,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2022-11-20 12:28:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 3111. [2022-11-20 12:28:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 3094 states have (on average 3.3409825468649) internal successors, (10337), 3110 states have internal predecessors, (10337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 10337 transitions. [2022-11-20 12:28:59,015 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 10337 transitions. Word has length 15 [2022-11-20 12:28:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:28:59,016 INFO L495 AbstractCegarLoop]: Abstraction has 3111 states and 10337 transitions. [2022-11-20 12:28:59,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:28:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 10337 transitions. [2022-11-20 12:28:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:28:59,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:28:59,018 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:28:59,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 12:28:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:59,231 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:28:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:28:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 132774882, now seen corresponding path program 2 times [2022-11-20 12:28:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:28:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271689309] [2022-11-20 12:28:59,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:28:59,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:28:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:28:59,233 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:28:59,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:28:59,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:28:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:28:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:28:59,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:28:59,545 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:28:59,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:28:59,641 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:28:59,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:28:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:28:59,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:28:59,863 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:28:59,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:28:59,948 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:28:59,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 12:29:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:03,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:03,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271689309] [2022-11-20 12:29:03,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271689309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:03,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:29:03,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:29:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464577436] [2022-11-20 12:29:03,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:29:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:29:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:29:03,606 INFO L87 Difference]: Start difference. First operand 3111 states and 10337 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:08,443 INFO L93 Difference]: Finished difference Result 3571 states and 11510 transitions. [2022-11-20 12:29:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:29:08,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:29:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:08,457 INFO L225 Difference]: With dead ends: 3571 [2022-11-20 12:29:08,457 INFO L226 Difference]: Without dead ends: 3571 [2022-11-20 12:29:08,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:29:08,458 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:08,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 167 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 738 Invalid, 0 Unknown, 334 Unchecked, 3.8s Time] [2022-11-20 12:29:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2022-11-20 12:29:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3116. [2022-11-20 12:29:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3099 states have (on average 3.340432397547596) internal successors, (10352), 3115 states have internal predecessors, (10352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 10352 transitions. [2022-11-20 12:29:08,532 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 10352 transitions. Word has length 15 [2022-11-20 12:29:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:08,532 INFO L495 AbstractCegarLoop]: Abstraction has 3116 states and 10352 transitions. [2022-11-20 12:29:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 10352 transitions. [2022-11-20 12:29:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:08,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:08,534 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:08,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-20 12:29:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:08,734 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 134447022, now seen corresponding path program 3 times [2022-11-20 12:29:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:08,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889291360] [2022-11-20 12:29:08,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:29:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:08,736 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:08,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:29:08,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:29:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:09,024 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:29:09,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:29:09,124 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:09,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:09,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:29:09,355 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:09,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:09,543 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:29:09,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 12:29:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:29:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:29:14,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:14,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889291360] [2022-11-20 12:29:14,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889291360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:14,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:29:14,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 12:29:14,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689724301] [2022-11-20 12:29:14,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:14,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:29:14,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:29:14,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=137, Unknown=1, NotChecked=0, Total=182 [2022-11-20 12:29:14,032 INFO L87 Difference]: Start difference. First operand 3116 states and 10352 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 12:29:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:21,728 INFO L93 Difference]: Finished difference Result 4245 states and 14165 transitions. [2022-11-20 12:29:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:29:21,730 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 15 [2022-11-20 12:29:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:21,738 INFO L225 Difference]: With dead ends: 4245 [2022-11-20 12:29:21,739 INFO L226 Difference]: Without dead ends: 4245 [2022-11-20 12:29:21,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=174, Invalid=377, Unknown=1, NotChecked=0, Total=552 [2022-11-20 12:29:21,739 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 337 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:21,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 64 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 307 Invalid, 0 Unknown, 571 Unchecked, 3.7s Time] [2022-11-20 12:29:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2022-11-20 12:29:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 2597. [2022-11-20 12:29:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2580 states have (on average 3.3170542635658915) internal successors, (8558), 2596 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 8558 transitions. [2022-11-20 12:29:21,790 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 8558 transitions. Word has length 15 [2022-11-20 12:29:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:21,790 INFO L495 AbstractCegarLoop]: Abstraction has 2597 states and 8558 transitions. [2022-11-20 12:29:21,790 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 12:29:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 8558 transitions. [2022-11-20 12:29:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:21,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:21,791 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:21,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-20 12:29:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:21,993 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:21,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1134435536, now seen corresponding path program 2 times [2022-11-20 12:29:21,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:21,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258451710] [2022-11-20 12:29:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:29:21,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:21,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:21,994 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:21,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:22,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:29:22,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:22,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:29:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:22,278 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:29:22,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:29:22,364 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:22,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:22,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:29:22,556 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:22,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:22,621 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:29:22,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 12:29:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:22,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:29:32,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258451710] [2022-11-20 12:29:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258451710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:32,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:29:32,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:29:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006641105] [2022-11-20 12:29:32,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:29:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:29:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=312, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:29:32,440 INFO L87 Difference]: Start difference. First operand 2597 states and 8558 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:36,192 INFO L93 Difference]: Finished difference Result 3661 states and 12814 transitions. [2022-11-20 12:29:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:29:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:29:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:36,201 INFO L225 Difference]: With dead ends: 3661 [2022-11-20 12:29:36,202 INFO L226 Difference]: Without dead ends: 3661 [2022-11-20 12:29:36,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=106, Invalid=443, Unknown=3, NotChecked=0, Total=552 [2022-11-20 12:29:36,202 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 187 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:36,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 201 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 629 Invalid, 0 Unknown, 623 Unchecked, 3.1s Time] [2022-11-20 12:29:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2022-11-20 12:29:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3053. [2022-11-20 12:29:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3036 states have (on average 3.5760869565217392) internal successors, (10857), 3052 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 10857 transitions. [2022-11-20 12:29:36,268 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 10857 transitions. Word has length 15 [2022-11-20 12:29:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 10857 transitions. [2022-11-20 12:29:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 10857 transitions. [2022-11-20 12:29:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:36,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:36,270 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:36,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-20 12:29:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:36,475 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1721466725, now seen corresponding path program 1 times [2022-11-20 12:29:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148877297] [2022-11-20 12:29:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:29:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:36,477 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:36,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:29:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:29:36,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:36,790 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:29:36,791 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:29:36,901 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:36,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:37,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:37,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:29:37,349 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:37,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:37,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:29:37,850 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 12:29:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:29:48,735 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 12:29:48,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:48,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148877297] [2022-11-20 12:29:48,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148877297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:29:48,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:29:48,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:29:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446809705] [2022-11-20 12:29:48,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:29:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:29:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:29:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=193, Unknown=2, NotChecked=0, Total=240 [2022-11-20 12:29:48,737 INFO L87 Difference]: Start difference. First operand 3053 states and 10857 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:51,523 INFO L93 Difference]: Finished difference Result 4175 states and 14623 transitions. [2022-11-20 12:29:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:29:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:29:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:51,536 INFO L225 Difference]: With dead ends: 4175 [2022-11-20 12:29:51,536 INFO L226 Difference]: Without dead ends: 4175 [2022-11-20 12:29:51,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=62, Invalid=242, Unknown=2, NotChecked=0, Total=306 [2022-11-20 12:29:51,537 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:51,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 175 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 420 Invalid, 0 Unknown, 440 Unchecked, 2.0s Time] [2022-11-20 12:29:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-11-20 12:29:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3412. [2022-11-20 12:29:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3395 states have (on average 3.659499263622975) internal successors, (12424), 3411 states have internal predecessors, (12424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 12424 transitions. [2022-11-20 12:29:51,617 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 12424 transitions. Word has length 15 [2022-11-20 12:29:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 3412 states and 12424 transitions. [2022-11-20 12:29:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 12424 transitions. [2022-11-20 12:29:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:51,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:51,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:51,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:29:51,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:51,827 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -498225763, now seen corresponding path program 2 times [2022-11-20 12:29:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:51,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712212349] [2022-11-20 12:29:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:29:51,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:51,829 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:51,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:29:51,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:29:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:52,115 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:29:52,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:29:52,224 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:52,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:52,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:52,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:29:52,504 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:52,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:52,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:52,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:29:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:29:52,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:29:52,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:52,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712212349] [2022-11-20 12:29:52,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712212349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:29:52,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:29:52,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:29:52,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614886465] [2022-11-20 12:29:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:29:52,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:29:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:29:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:29:52,976 INFO L87 Difference]: Start difference. First operand 3412 states and 12424 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 12:29:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:53,911 INFO L93 Difference]: Finished difference Result 3562 states and 12817 transitions. [2022-11-20 12:29:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:29:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 15 [2022-11-20 12:29:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:53,926 INFO L225 Difference]: With dead ends: 3562 [2022-11-20 12:29:53,926 INFO L226 Difference]: Without dead ends: 3562 [2022-11-20 12:29:53,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:29:53,927 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:53,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 83 Unchecked, 0.7s Time] [2022-11-20 12:29:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2022-11-20 12:29:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 3441. [2022-11-20 12:29:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 3424 states have (on average 3.648072429906542) internal successors, (12491), 3440 states have internal predecessors, (12491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 12491 transitions. [2022-11-20 12:29:54,017 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 12491 transitions. Word has length 15 [2022-11-20 12:29:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:54,017 INFO L495 AbstractCegarLoop]: Abstraction has 3441 states and 12491 transitions. [2022-11-20 12:29:54,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 12:29:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 12491 transitions. [2022-11-20 12:29:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:54,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:54,019 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:54,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:54,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:54,233 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -379315577, now seen corresponding path program 3 times [2022-11-20 12:29:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:54,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646689412] [2022-11-20 12:29:54,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:29:54,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:54,234 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:54,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:54,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:29:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:54,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:29:54,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:54,523 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:29:54,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:29:54,629 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:54,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:54,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:29:54,897 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:54,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:29:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:29:55,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:29:55,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:29:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646689412] [2022-11-20 12:29:55,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646689412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:29:55,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:29:55,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:29:55,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684262287] [2022-11-20 12:29:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:29:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:29:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:29:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:29:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:29:55,401 INFO L87 Difference]: Start difference. First operand 3441 states and 12491 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 12:29:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:29:56,327 INFO L93 Difference]: Finished difference Result 3592 states and 12896 transitions. [2022-11-20 12:29:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:29:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 15 [2022-11-20 12:29:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:29:56,338 INFO L225 Difference]: With dead ends: 3592 [2022-11-20 12:29:56,338 INFO L226 Difference]: Without dead ends: 3592 [2022-11-20 12:29:56,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:29:56,339 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:29:56,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-11-20 12:29:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2022-11-20 12:29:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3433. [2022-11-20 12:29:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3416 states have (on average 3.6519320843091334) internal successors, (12475), 3432 states have internal predecessors, (12475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:29:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 12475 transitions. [2022-11-20 12:29:56,418 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 12475 transitions. Word has length 15 [2022-11-20 12:29:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:29:56,418 INFO L495 AbstractCegarLoop]: Abstraction has 3433 states and 12475 transitions. [2022-11-20 12:29:56,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 12:29:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 12475 transitions. [2022-11-20 12:29:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:29:56,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:29:56,420 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:29:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:56,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:56,635 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:29:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:29:56,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1478769939, now seen corresponding path program 4 times [2022-11-20 12:29:56,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:29:56,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472813971] [2022-11-20 12:29:56,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:29:56,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:29:56,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:29:56,638 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:29:56,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:29:56,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:29:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:29:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:29:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:29:57,039 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:29:57,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:29:57,145 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:29:57,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:29:57,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:57,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:29:57,538 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:29:57,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:29:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:29:57,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:29:58,069 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 12:29:58,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:08,752 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 12:30:08,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:30:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472813971] [2022-11-20 12:30:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472813971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:08,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:30:08,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:30:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749880019] [2022-11-20 12:30:08,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:30:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:30:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:30:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:30:08,755 INFO L87 Difference]: Start difference. First operand 3433 states and 12475 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:26,038 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:30:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:27,011 INFO L93 Difference]: Finished difference Result 3756 states and 13310 transitions. [2022-11-20 12:30:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:30:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 12:30:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:27,022 INFO L225 Difference]: With dead ends: 3756 [2022-11-20 12:30:27,022 INFO L226 Difference]: Without dead ends: 3756 [2022-11-20 12:30:27,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:30:27,023 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:27,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 80 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 369 Unchecked, 1.3s Time] [2022-11-20 12:30:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2022-11-20 12:30:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3428. [2022-11-20 12:30:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3411 states have (on average 3.654353562005277) internal successors, (12465), 3427 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12465 transitions. [2022-11-20 12:30:27,096 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12465 transitions. Word has length 15 [2022-11-20 12:30:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:27,096 INFO L495 AbstractCegarLoop]: Abstraction has 3428 states and 12465 transitions. [2022-11-20 12:30:27,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12465 transitions. [2022-11-20 12:30:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:30:27,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:27,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:27,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-20 12:30:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:27,299 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:30:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash -119360969, now seen corresponding path program 3 times [2022-11-20 12:30:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:30:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698051301] [2022-11-20 12:30:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:30:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:30:27,301 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:30:27,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:30:27,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 12:30:27,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:30:27,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 12:30:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:27,706 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:30:27,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:30:27,807 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:30:27,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:30:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:30:28,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:30:28,153 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:30:28,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:30:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:28,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:31,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:30:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698051301] [2022-11-20 12:30:31,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698051301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:31,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:30:31,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 12:30:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240761604] [2022-11-20 12:30:31,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 12:30:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:30:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 12:30:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:30:31,836 INFO L87 Difference]: Start difference. First operand 3428 states and 12465 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:33,981 INFO L93 Difference]: Finished difference Result 3465 states and 12556 transitions. [2022-11-20 12:30:33,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:30:33,982 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:30:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:33,991 INFO L225 Difference]: With dead ends: 3465 [2022-11-20 12:30:33,991 INFO L226 Difference]: Without dead ends: 3465 [2022-11-20 12:30:33,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:30:33,992 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:33,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 121 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 530 Unchecked, 1.2s Time] [2022-11-20 12:30:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-11-20 12:30:34,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3450. [2022-11-20 12:30:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3433 states have (on average 3.648121176813283) internal successors, (12524), 3449 states have internal predecessors, (12524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 12524 transitions. [2022-11-20 12:30:34,058 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 12524 transitions. Word has length 16 [2022-11-20 12:30:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:34,058 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 12524 transitions. [2022-11-20 12:30:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 12524 transitions. [2022-11-20 12:30:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:30:34,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:34,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:34,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-20 12:30:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:34,271 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:30:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1650892485, now seen corresponding path program 4 times [2022-11-20 12:30:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:30:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452184892] [2022-11-20 12:30:34,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:30:34,272 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 12:30:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:30:34,273 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:30:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:30:34,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:30:34,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:30:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:30:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:34,604 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:30:34,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:30:34,831 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 12 [2022-11-20 12:30:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:35,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:36,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:30:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452184892] [2022-11-20 12:30:36,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452184892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:36,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:30:36,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 12:30:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577389550] [2022-11-20 12:30:36,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:30:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:30:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:30:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:30:36,135 INFO L87 Difference]: Start difference. First operand 3450 states and 12524 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:46,824 INFO L93 Difference]: Finished difference Result 5408 states and 19038 transitions. [2022-11-20 12:30:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 12:30:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:30:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:46,845 INFO L225 Difference]: With dead ends: 5408 [2022-11-20 12:30:46,846 INFO L226 Difference]: Without dead ends: 5408 [2022-11-20 12:30:46,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:30:46,847 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 653 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:46,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 596 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-20 12:30:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5408 states. [2022-11-20 12:30:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5408 to 4663. [2022-11-20 12:30:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4646 states have (on average 3.6922083512699095) internal successors, (17154), 4662 states have internal predecessors, (17154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 17154 transitions. [2022-11-20 12:30:46,984 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 17154 transitions. Word has length 16 [2022-11-20 12:30:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:46,984 INFO L495 AbstractCegarLoop]: Abstraction has 4663 states and 17154 transitions. [2022-11-20 12:30:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 17154 transitions. [2022-11-20 12:30:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:30:46,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:46,987 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:47,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-20 12:30:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:47,187 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:30:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1812253202, now seen corresponding path program 1 times [2022-11-20 12:30:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:30:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285209532] [2022-11-20 12:30:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:30:47,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:30:47,190 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:30:47,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:30:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:30:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:30:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:47,580 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:30:47,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:30:47,674 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:30:47,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:30:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:30:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:30:48,037 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:30:48,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:30:48,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:30:48,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-11-20 12:30:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:30:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:30:54,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:30:54,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285209532] [2022-11-20 12:30:54,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285209532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:30:54,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:30:54,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:30:54,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990271028] [2022-11-20 12:30:54,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:30:54,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:30:54,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:30:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:30:54,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:30:54,597 INFO L87 Difference]: Start difference. First operand 4663 states and 17154 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:30:59,284 INFO L93 Difference]: Finished difference Result 4719 states and 17310 transitions. [2022-11-20 12:30:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:30:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:30:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:30:59,297 INFO L225 Difference]: With dead ends: 4719 [2022-11-20 12:30:59,297 INFO L226 Difference]: Without dead ends: 4719 [2022-11-20 12:30:59,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:30:59,298 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:30:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 147 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 311 Unchecked, 0.9s Time] [2022-11-20 12:30:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2022-11-20 12:30:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 4677. [2022-11-20 12:30:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4660 states have (on average 3.6877682403433476) internal successors, (17185), 4676 states have internal predecessors, (17185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 17185 transitions. [2022-11-20 12:30:59,381 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 17185 transitions. Word has length 16 [2022-11-20 12:30:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:30:59,381 INFO L495 AbstractCegarLoop]: Abstraction has 4677 states and 17185 transitions. [2022-11-20 12:30:59,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:30:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 17185 transitions. [2022-11-20 12:30:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:30:59,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:30:59,384 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:30:59,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:30:59,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:59,584 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:30:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:30:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -807599774, now seen corresponding path program 2 times [2022-11-20 12:30:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:30:59,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732283187] [2022-11-20 12:30:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:30:59,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:30:59,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:30:59,586 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:30:59,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:30:59,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:30:59,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:30:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:30:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:30:59,928 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:30:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:31:00,019 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:31:00,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:31:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:31:00,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:31:00,279 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:31:00,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:31:00,348 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:31:00,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 12:31:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:00,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:10,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:31:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732283187] [2022-11-20 12:31:10,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732283187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:10,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:31:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:31:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447376669] [2022-11-20 12:31:10,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:10,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:31:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:31:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:31:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=312, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:31:10,040 INFO L87 Difference]: Start difference. First operand 4677 states and 17185 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:31:14,950 INFO L93 Difference]: Finished difference Result 7490 states and 27418 transitions. [2022-11-20 12:31:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:31:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:31:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:31:14,970 INFO L225 Difference]: With dead ends: 7490 [2022-11-20 12:31:14,970 INFO L226 Difference]: Without dead ends: 7490 [2022-11-20 12:31:14,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=159, Invalid=650, Unknown=3, NotChecked=0, Total=812 [2022-11-20 12:31:14,971 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 659 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 956 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:31:14,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 168 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 548 Invalid, 0 Unknown, 956 Unchecked, 3.2s Time] [2022-11-20 12:31:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7490 states. [2022-11-20 12:31:15,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7490 to 3828. [2022-11-20 12:31:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3811 states have (on average 3.5478876935187613) internal successors, (13521), 3827 states have internal predecessors, (13521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 13521 transitions. [2022-11-20 12:31:15,070 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 13521 transitions. Word has length 16 [2022-11-20 12:31:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:31:15,071 INFO L495 AbstractCegarLoop]: Abstraction has 3828 states and 13521 transitions. [2022-11-20 12:31:15,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:15,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 13521 transitions. [2022-11-20 12:31:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:31:15,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:31:15,073 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:15,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-20 12:31:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:31:15,273 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:31:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -807761036, now seen corresponding path program 1 times [2022-11-20 12:31:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:31:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38209308] [2022-11-20 12:31:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:15,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:31:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:31:15,275 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:31:15,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:31:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:31:15,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:15,641 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:31:15,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:31:15,742 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:31:15,743 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:31:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:31:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:31:16,106 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:31:16,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:31:16,205 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:31:16,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 12:31:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:16,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:31:20,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:31:20,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38209308] [2022-11-20 12:31:20,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38209308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:20,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:31:20,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:31:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577404535] [2022-11-20 12:31:20,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:31:20,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:31:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:31:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:31:20,376 INFO L87 Difference]: Start difference. First operand 3828 states and 13521 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:31:37,090 INFO L93 Difference]: Finished difference Result 4016 states and 14094 transitions. [2022-11-20 12:31:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:31:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:31:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:31:37,102 INFO L225 Difference]: With dead ends: 4016 [2022-11-20 12:31:37,102 INFO L226 Difference]: Without dead ends: 4016 [2022-11-20 12:31:37,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=149, Invalid=719, Unknown=2, NotChecked=0, Total=870 [2022-11-20 12:31:37,102 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:31:37,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 92 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 218 Unchecked, 3.6s Time] [2022-11-20 12:31:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2022-11-20 12:31:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3877. [2022-11-20 12:31:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3860 states have (on average 3.551036269430052) internal successors, (13707), 3876 states have internal predecessors, (13707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 13707 transitions. [2022-11-20 12:31:37,205 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 13707 transitions. Word has length 16 [2022-11-20 12:31:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:31:37,205 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 13707 transitions. [2022-11-20 12:31:37,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 13707 transitions. [2022-11-20 12:31:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:31:37,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:31:37,207 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:31:37,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-20 12:31:37,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:31:37,407 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:31:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:31:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1745153273, now seen corresponding path program 1 times [2022-11-20 12:31:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:31:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098076158] [2022-11-20 12:31:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:31:37,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:31:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:31:37,410 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:31:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:31:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:31:37,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:31:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:31:37,775 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:31:37,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:31:37,872 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:31:37,873 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:31:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:31:38,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:31:38,272 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:31:38,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:31:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:31:38,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:31:38,880 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 12:31:38,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:31:46,939 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 12:31:46,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:31:46,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098076158] [2022-11-20 12:31:46,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098076158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:31:46,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:31:46,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:31:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911873589] [2022-11-20 12:31:46,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:31:46,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:31:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:31:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:31:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:31:46,941 INFO L87 Difference]: Start difference. First operand 3877 states and 13707 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:31:59,000 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:32:06,777 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:32:07,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:32:07,534 INFO L93 Difference]: Finished difference Result 3975 states and 13950 transitions. [2022-11-20 12:32:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:32:07,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:32:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:32:07,545 INFO L225 Difference]: With dead ends: 3975 [2022-11-20 12:32:07,546 INFO L226 Difference]: Without dead ends: 3975 [2022-11-20 12:32:07,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:32:07,546 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:32:07,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 95 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 291 Unchecked, 1.0s Time] [2022-11-20 12:32:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2022-11-20 12:32:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3893. [2022-11-20 12:32:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3876 states have (on average 3.5466976264189887) internal successors, (13747), 3892 states have internal predecessors, (13747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 13747 transitions. [2022-11-20 12:32:07,635 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 13747 transitions. Word has length 16 [2022-11-20 12:32:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:32:07,635 INFO L495 AbstractCegarLoop]: Abstraction has 3893 states and 13747 transitions. [2022-11-20 12:32:07,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 13747 transitions. [2022-11-20 12:32:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:32:07,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:32:07,636 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:32:07,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-20 12:32:07,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:32:07,837 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:32:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:32:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1745038573, now seen corresponding path program 1 times [2022-11-20 12:32:07,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:32:07,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285484054] [2022-11-20 12:32:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:32:07,838 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 12:32:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:32:07,839 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:32:07,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:32:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:32:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:32:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:08,188 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:32:08,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:32:08,294 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:32:08,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:32:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:32:08,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:32:08,715 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:32:08,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:32:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:32:08,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:32:09,259 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 12:32:09,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:11,641 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_~X_0~0.offset))) (and (or (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_131| (_ BitVec 32))) (or (forall ((v_ArrVal_1665 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t3~0.base_131| v_ArrVal_1665) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_131|)))))) is different from false [2022-11-20 12:32:18,092 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 12:32:18,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:32:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285484054] [2022-11-20 12:32:18,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285484054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:18,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:32:18,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:32:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102167367] [2022-11-20 12:32:18,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:32:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:32:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:32:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2022-11-20 12:32:18,094 INFO L87 Difference]: Start difference. First operand 3893 states and 13747 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:29,317 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:32:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:32:30,194 INFO L93 Difference]: Finished difference Result 3986 states and 13977 transitions. [2022-11-20 12:32:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:32:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:32:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:32:30,206 INFO L225 Difference]: With dead ends: 3986 [2022-11-20 12:32:30,206 INFO L226 Difference]: Without dead ends: 3986 [2022-11-20 12:32:30,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=79, Invalid=304, Unknown=1, NotChecked=36, Total=420 [2022-11-20 12:32:30,207 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:32:30,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 103 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 355 Unchecked, 1.0s Time] [2022-11-20 12:32:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-11-20 12:32:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3899. [2022-11-20 12:32:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3882 states have (on average 3.545079855744462) internal successors, (13762), 3898 states have internal predecessors, (13762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 13762 transitions. [2022-11-20 12:32:30,287 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 13762 transitions. Word has length 16 [2022-11-20 12:32:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:32:30,287 INFO L495 AbstractCegarLoop]: Abstraction has 3899 states and 13762 transitions. [2022-11-20 12:32:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 13762 transitions. [2022-11-20 12:32:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:32:30,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:32:30,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:32:30,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:32:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:32:30,491 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:32:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:32:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1734867814, now seen corresponding path program 1 times [2022-11-20 12:32:30,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:32:30,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476750964] [2022-11-20 12:32:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:32:30,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:32:30,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:32:30,493 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:32:30,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:32:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:32:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:32:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:32:30,875 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:32:30,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:32:30,984 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:32:30,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:32:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:32:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:32:31,392 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:32:31,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:32:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:32:31,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:32:31,978 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 12:32:31,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:32:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:32:43,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:32:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476750964] [2022-11-20 12:32:43,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476750964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:32:43,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:32:43,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:32:43,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935764726] [2022-11-20 12:32:43,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:32:43,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:32:43,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:32:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:32:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=193, Unknown=2, NotChecked=0, Total=240 [2022-11-20 12:32:43,869 INFO L87 Difference]: Start difference. First operand 3899 states and 13762 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:32:59,917 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:33:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:07,272 INFO L93 Difference]: Finished difference Result 4486 states and 15333 transitions. [2022-11-20 12:33:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:33:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:07,284 INFO L225 Difference]: With dead ends: 4486 [2022-11-20 12:33:07,284 INFO L226 Difference]: Without dead ends: 4486 [2022-11-20 12:33:07,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=75, Invalid=301, Unknown=4, NotChecked=0, Total=380 [2022-11-20 12:33:07,285 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 167 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 345 Invalid, 0 Unknown, 697 Unchecked, 1.6s Time] [2022-11-20 12:33:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2022-11-20 12:33:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3931. [2022-11-20 12:33:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3914 states have (on average 3.5365355135411343) internal successors, (13842), 3930 states have internal predecessors, (13842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 13842 transitions. [2022-11-20 12:33:07,358 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 13842 transitions. Word has length 16 [2022-11-20 12:33:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:07,358 INFO L495 AbstractCegarLoop]: Abstraction has 3931 states and 13842 transitions. [2022-11-20 12:33:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 13842 transitions. [2022-11-20 12:33:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:07,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:07,360 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:07,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:07,560 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1136401743, now seen corresponding path program 2 times [2022-11-20 12:33:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:07,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601927028] [2022-11-20 12:33:07,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:33:07,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:07,562 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:07,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:07,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:33:07,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:07,899 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:07,899 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 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:08,016 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:08,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:08,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:08,290 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:08,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:08,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:08,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:08,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:08,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601927028] [2022-11-20 12:33:08,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601927028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:08,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:08,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589794384] [2022-11-20 12:33:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:08,829 INFO L87 Difference]: Start difference. First operand 3931 states and 13842 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:09,611 INFO L93 Difference]: Finished difference Result 4346 states and 15186 transitions. [2022-11-20 12:33:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:33:09,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:09,622 INFO L225 Difference]: With dead ends: 4346 [2022-11-20 12:33:09,622 INFO L226 Difference]: Without dead ends: 4346 [2022-11-20 12:33:09,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:09,623 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:09,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 29 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 77 Unchecked, 0.6s Time] [2022-11-20 12:33:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2022-11-20 12:33:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4015. [2022-11-20 12:33:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4015 states, 3998 states have (on average 3.518759379689845) internal successors, (14068), 4014 states have internal predecessors, (14068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4015 states to 4015 states and 14068 transitions. [2022-11-20 12:33:09,698 INFO L78 Accepts]: Start accepts. Automaton has 4015 states and 14068 transitions. Word has length 16 [2022-11-20 12:33:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:09,698 INFO L495 AbstractCegarLoop]: Abstraction has 4015 states and 14068 transitions. [2022-11-20 12:33:09,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4015 states and 14068 transitions. [2022-11-20 12:33:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:09,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:09,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:09,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-20 12:33:09,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:09,900 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1136287043, now seen corresponding path program 2 times [2022-11-20 12:33:09,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:09,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123055992] [2022-11-20 12:33:09,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:33:09,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:09,902 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:09,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:10,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:33:10,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:10,235 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:10,375 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:10,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:10,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:10,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:10,705 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:10,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:10,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:11,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:11,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123055992] [2022-11-20 12:33:11,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123055992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:11,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:11,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019184337] [2022-11-20 12:33:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:11,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:11,267 INFO L87 Difference]: Start difference. First operand 4015 states and 14068 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:12,237 INFO L93 Difference]: Finished difference Result 4305 states and 15008 transitions. [2022-11-20 12:33:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:33:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:12,250 INFO L225 Difference]: With dead ends: 4305 [2022-11-20 12:33:12,250 INFO L226 Difference]: Without dead ends: 4305 [2022-11-20 12:33:12,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:12,251 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:12,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 104 Unchecked, 0.8s Time] [2022-11-20 12:33:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2022-11-20 12:33:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 4015. [2022-11-20 12:33:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4015 states, 3998 states have (on average 3.518009004502251) internal successors, (14065), 4014 states have internal predecessors, (14065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4015 states to 4015 states and 14065 transitions. [2022-11-20 12:33:12,352 INFO L78 Accepts]: Start accepts. Automaton has 4015 states and 14065 transitions. Word has length 16 [2022-11-20 12:33:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:12,352 INFO L495 AbstractCegarLoop]: Abstraction has 4015 states and 14065 transitions. [2022-11-20 12:33:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4015 states and 14065 transitions. [2022-11-20 12:33:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:12,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:12,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:12,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:12,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:12,554 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1126116284, now seen corresponding path program 2 times [2022-11-20 12:33:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:12,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959708370] [2022-11-20 12:33:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:33:12,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:12,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:12,556 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:33:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:12,874 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:12,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:12,980 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:12,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:13,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:13,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:13,328 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:13,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:13,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:13,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:13,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:13,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959708370] [2022-11-20 12:33:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959708370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:13,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285080346] [2022-11-20 12:33:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:13,846 INFO L87 Difference]: Start difference. First operand 4015 states and 14065 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:14,793 INFO L93 Difference]: Finished difference Result 4215 states and 14628 transitions. [2022-11-20 12:33:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:33:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:14,805 INFO L225 Difference]: With dead ends: 4215 [2022-11-20 12:33:14,805 INFO L226 Difference]: Without dead ends: 4215 [2022-11-20 12:33:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:14,806 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:14,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 68 Unchecked, 0.7s Time] [2022-11-20 12:33:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2022-11-20 12:33:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 4019. [2022-11-20 12:33:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4019 states, 4002 states have (on average 3.5177411294352825) internal successors, (14078), 4018 states have internal predecessors, (14078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 14078 transitions. [2022-11-20 12:33:14,885 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 14078 transitions. Word has length 16 [2022-11-20 12:33:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:14,885 INFO L495 AbstractCegarLoop]: Abstraction has 4019 states and 14078 transitions. [2022-11-20 12:33:14,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 14078 transitions. [2022-11-20 12:33:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:14,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:14,887 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:14,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-20 12:33:15,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:15,088 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1392489405, now seen corresponding path program 3 times [2022-11-20 12:33:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:15,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801908742] [2022-11-20 12:33:15,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:33:15,088 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 12:33:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:15,089 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:33:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:15,470 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:15,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:15,610 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:15,610 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:15,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:15,901 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:15,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:15,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:16,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:16,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:16,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801908742] [2022-11-20 12:33:16,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801908742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:16,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:16,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782968755] [2022-11-20 12:33:16,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:16,446 INFO L87 Difference]: Start difference. First operand 4019 states and 14078 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:17,365 INFO L93 Difference]: Finished difference Result 4318 states and 15084 transitions. [2022-11-20 12:33:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:33:17,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:17,377 INFO L225 Difference]: With dead ends: 4318 [2022-11-20 12:33:17,377 INFO L226 Difference]: Without dead ends: 4318 [2022-11-20 12:33:17,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:17,378 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:17,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-11-20 12:33:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2022-11-20 12:33:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 4015. [2022-11-20 12:33:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4015 states, 3998 states have (on average 3.5182591295647825) internal successors, (14066), 4014 states have internal predecessors, (14066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4015 states to 4015 states and 14066 transitions. [2022-11-20 12:33:17,461 INFO L78 Accepts]: Start accepts. Automaton has 4015 states and 14066 transitions. Word has length 16 [2022-11-20 12:33:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:17,461 INFO L495 AbstractCegarLoop]: Abstraction has 4015 states and 14066 transitions. [2022-11-20 12:33:17,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:17,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4015 states and 14066 transitions. [2022-11-20 12:33:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:17,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:17,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:17,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-20 12:33:17,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:17,664 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:17,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1392604105, now seen corresponding path program 3 times [2022-11-20 12:33:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:17,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939640268] [2022-11-20 12:33:17,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:33:17,665 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 12:33:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:17,665 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:17,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:33:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:17,984 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:17,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:18,090 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:18,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:18,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:18,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:18,404 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:18,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:18,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:18,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:18,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939640268] [2022-11-20 12:33:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939640268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:18,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:18,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:18,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275804080] [2022-11-20 12:33:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:18,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:18,936 INFO L87 Difference]: Start difference. First operand 4015 states and 14066 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:19,809 INFO L93 Difference]: Finished difference Result 4277 states and 14915 transitions. [2022-11-20 12:33:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:33:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:19,821 INFO L225 Difference]: With dead ends: 4277 [2022-11-20 12:33:19,821 INFO L226 Difference]: Without dead ends: 4277 [2022-11-20 12:33:19,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:19,821 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:19,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 65 Unchecked, 0.7s Time] [2022-11-20 12:33:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2022-11-20 12:33:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4007. [2022-11-20 12:33:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 3990 states have (on average 3.519298245614035) internal successors, (14042), 4006 states have internal predecessors, (14042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 14042 transitions. [2022-11-20 12:33:19,903 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 14042 transitions. Word has length 16 [2022-11-20 12:33:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:19,903 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 14042 transitions. [2022-11-20 12:33:19,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 14042 transitions. [2022-11-20 12:33:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:19,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:19,906 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:19,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:20,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:20,107 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1402774864, now seen corresponding path program 3 times [2022-11-20 12:33:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:20,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620389091] [2022-11-20 12:33:20,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:33:20,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:20,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:20,111 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:20,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:20,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:33:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:33:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:20,441 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:33:20,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:33:20,565 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:20,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:20,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:20,841 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:20,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:20,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:20,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:33:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:33:21,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:33:21,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:21,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620389091] [2022-11-20 12:33:21,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620389091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:33:21,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:33:21,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:33:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976540038] [2022-11-20 12:33:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:33:21,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:33:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:33:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:33:21,409 INFO L87 Difference]: Start difference. First operand 4007 states and 14042 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:33:22,367 INFO L93 Difference]: Finished difference Result 4210 states and 14610 transitions. [2022-11-20 12:33:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:33:22,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:33:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:33:22,378 INFO L225 Difference]: With dead ends: 4210 [2022-11-20 12:33:22,378 INFO L226 Difference]: Without dead ends: 4210 [2022-11-20 12:33:22,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:33:22,379 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:33:22,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2022-11-20 12:33:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2022-11-20 12:33:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3990. [2022-11-20 12:33:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3973 states have (on average 3.5232821545431663) internal successors, (13998), 3989 states have internal predecessors, (13998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 13998 transitions. [2022-11-20 12:33:22,457 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 13998 transitions. Word has length 16 [2022-11-20 12:33:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:33:22,457 INFO L495 AbstractCegarLoop]: Abstraction has 3990 states and 13998 transitions. [2022-11-20 12:33:22,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:33:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 13998 transitions. [2022-11-20 12:33:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:33:22,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:33:22,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:33:22,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-20 12:33:22,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:22,660 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:33:22,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:33:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -975784664, now seen corresponding path program 1 times [2022-11-20 12:33:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:33:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078050167] [2022-11-20 12:33:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:33:22,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:33:22,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:33:22,662 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:33:22,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:33:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:33:22,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:33:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:33:23,100 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:33:23,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:33:23,211 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:33:23,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:33:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:23,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:33:23,615 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:33:23,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:33:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:33:23,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:33:24,166 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 12:33:24,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:33:32,805 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:33:40,198 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 12:33:40,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:33:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078050167] [2022-11-20 12:33:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078050167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:33:40,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:33:40,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:33:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000964854] [2022-11-20 12:33:40,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:33:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:33:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:33:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:33:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:33:40,200 INFO L87 Difference]: Start difference. First operand 3990 states and 13998 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:01,073 WARN L233 SmtUtils]: Spent 11.63s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:34:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:34:01,544 INFO L93 Difference]: Finished difference Result 4258 states and 14833 transitions. [2022-11-20 12:34:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:34:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 12:34:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:34:01,557 INFO L225 Difference]: With dead ends: 4258 [2022-11-20 12:34:01,557 INFO L226 Difference]: Without dead ends: 4258 [2022-11-20 12:34:01,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:34:01,557 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:34:01,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 106 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 339 Unchecked, 0.7s Time] [2022-11-20 12:34:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-11-20 12:34:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4097. [2022-11-20 12:34:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4080 states have (on average 3.51078431372549) internal successors, (14324), 4096 states have internal predecessors, (14324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 14324 transitions. [2022-11-20 12:34:01,634 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 14324 transitions. Word has length 16 [2022-11-20 12:34:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:34:01,634 INFO L495 AbstractCegarLoop]: Abstraction has 4097 states and 14324 transitions. [2022-11-20 12:34:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 14324 transitions. [2022-11-20 12:34:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:34:01,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:34:01,636 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:34:01,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:34:01,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:01,841 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:34:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:34:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1619497471, now seen corresponding path program 5 times [2022-11-20 12:34:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:34:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125383800] [2022-11-20 12:34:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:34:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:34:01,843 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:34:01,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:34:02,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 12:34:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:34:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 12:34:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:34:02,289 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:34:02,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:34:02,620 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 13 treesize of output 9 [2022-11-20 12:34:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:34:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:04,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:34:04,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125383800] [2022-11-20 12:34:04,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125383800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:34:04,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:34:04,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-20 12:34:04,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841472043] [2022-11-20 12:34:04,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:34:04,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 12:34:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:34:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 12:34:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:34:04,455 INFO L87 Difference]: Start difference. First operand 4097 states and 14324 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:34:21,214 INFO L93 Difference]: Finished difference Result 6262 states and 21103 transitions. [2022-11-20 12:34:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 12:34:21,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:34:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:34:21,298 INFO L225 Difference]: With dead ends: 6262 [2022-11-20 12:34:21,298 INFO L226 Difference]: Without dead ends: 6262 [2022-11-20 12:34:21,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=504, Invalid=1848, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 12:34:21,299 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 784 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 3611 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:34:21,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 752 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3611 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-20 12:34:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6262 states. [2022-11-20 12:34:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6262 to 4831. [2022-11-20 12:34:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4814 states have (on average 3.508932280847528) internal successors, (16892), 4830 states have internal predecessors, (16892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 16892 transitions. [2022-11-20 12:34:21,403 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 16892 transitions. Word has length 17 [2022-11-20 12:34:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:34:21,404 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 16892 transitions. [2022-11-20 12:34:21,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 16892 transitions. [2022-11-20 12:34:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:34:21,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:34:21,405 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:34:21,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-20 12:34:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:21,606 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:34:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:34:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -721057600, now seen corresponding path program 1 times [2022-11-20 12:34:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:34:21,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288623193] [2022-11-20 12:34:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:34:21,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:34:21,609 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:34:21,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:34:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:34:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:34:21,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:34:22,045 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:34:22,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:34:22,148 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:34:22,148 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:34:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:34:22,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:34:22,576 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:34:22,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:34:22,662 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:34:22,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 12:34:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:23,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:34:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:31,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:34:31,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288623193] [2022-11-20 12:34:31,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288623193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:34:31,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:34:31,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:34:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600616550] [2022-11-20 12:34:31,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:34:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:34:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:34:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:34:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=310, Unknown=2, NotChecked=0, Total=380 [2022-11-20 12:34:31,333 INFO L87 Difference]: Start difference. First operand 4831 states and 16892 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:34:49,886 INFO L93 Difference]: Finished difference Result 5286 states and 18328 transitions. [2022-11-20 12:34:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:34:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:34:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:34:49,903 INFO L225 Difference]: With dead ends: 5286 [2022-11-20 12:34:49,903 INFO L226 Difference]: Without dead ends: 5286 [2022-11-20 12:34:49,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=149, Invalid=715, Unknown=6, NotChecked=0, Total=870 [2022-11-20 12:34:49,903 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:34:49,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 190 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 555 Unchecked, 2.7s Time] [2022-11-20 12:34:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2022-11-20 12:34:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4909. [2022-11-20 12:34:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4892 states have (on average 3.5073589533932954) internal successors, (17158), 4908 states have internal predecessors, (17158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 17158 transitions. [2022-11-20 12:34:50,000 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 17158 transitions. Word has length 17 [2022-11-20 12:34:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:34:50,000 INFO L495 AbstractCegarLoop]: Abstraction has 4909 states and 17158 transitions. [2022-11-20 12:34:50,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:34:50,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 17158 transitions. [2022-11-20 12:34:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:34:50,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:34:50,002 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:34:50,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:34:50,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:50,203 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:34:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:34:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash -812047992, now seen corresponding path program 2 times [2022-11-20 12:34:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:34:50,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498036408] [2022-11-20 12:34:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:34:50,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:34:50,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:34:50,205 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:34:50,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:34:50,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:34:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:34:50,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 12:34:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:34:50,605 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:34:50,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:34:50,693 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:34:50,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:34:50,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:34:50,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:34:50,910 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:34:50,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:34:50,981 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:34:50,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 12:34:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:51,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:34:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:34:59,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:34:59,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498036408] [2022-11-20 12:34:59,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498036408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:34:59,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:34:59,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:34:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488080926] [2022-11-20 12:34:59,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:34:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:34:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:34:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:34:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=312, Unknown=2, NotChecked=0, Total=380 [2022-11-20 12:34:59,078 INFO L87 Difference]: Start difference. First operand 4909 states and 17158 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:35:10,957 INFO L93 Difference]: Finished difference Result 5675 states and 19979 transitions. [2022-11-20 12:35:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:35:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:35:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:35:10,971 INFO L225 Difference]: With dead ends: 5675 [2022-11-20 12:35:10,971 INFO L226 Difference]: Without dead ends: 5675 [2022-11-20 12:35:10,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=119, Invalid=477, Unknown=4, NotChecked=0, Total=600 [2022-11-20 12:35:10,971 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 218 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:35:10,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 132 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 388 Invalid, 0 Unknown, 538 Unchecked, 2.4s Time] [2022-11-20 12:35:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2022-11-20 12:35:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 5099. [2022-11-20 12:35:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5082 states have (on average 3.5047225501770956) internal successors, (17811), 5098 states have internal predecessors, (17811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:11,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 17811 transitions. [2022-11-20 12:35:11,081 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 17811 transitions. Word has length 17 [2022-11-20 12:35:11,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:35:11,081 INFO L495 AbstractCegarLoop]: Abstraction has 5099 states and 17811 transitions. [2022-11-20 12:35:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 17811 transitions. [2022-11-20 12:35:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:35:11,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:35:11,083 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:35:11,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:35:11,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:35:11,284 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:35:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:35:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash 345276626, now seen corresponding path program 3 times [2022-11-20 12:35:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:35:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817223713] [2022-11-20 12:35:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:35:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:35:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:35:11,285 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:35:11,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:35:11,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 12:35:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:35:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 12:35:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:35:11,636 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:35:11,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:35:11,729 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:35:11,730 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:35:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:35:11,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:35:11,975 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:35:11,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:35:12,061 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:35:12,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 12:35:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:35:12,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:35:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:35:19,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:35:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817223713] [2022-11-20 12:35:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817223713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:35:19,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:35:19,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 12:35:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154395054] [2022-11-20 12:35:19,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:35:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:35:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:35:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:35:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=135, Unknown=2, NotChecked=0, Total=182 [2022-11-20 12:35:19,076 INFO L87 Difference]: Start difference. First operand 5099 states and 17811 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:35:23,473 INFO L93 Difference]: Finished difference Result 8227 states and 28971 transitions. [2022-11-20 12:35:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:35:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:35:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:35:23,498 INFO L225 Difference]: With dead ends: 8227 [2022-11-20 12:35:23,499 INFO L226 Difference]: Without dead ends: 8227 [2022-11-20 12:35:23,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=66, Invalid=204, Unknown=2, NotChecked=0, Total=272 [2022-11-20 12:35:23,499 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:35:23,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 113 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 359 Unchecked, 3.8s Time] [2022-11-20 12:35:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2022-11-20 12:35:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6215. [2022-11-20 12:35:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6215 states, 6198 states have (on average 3.6782833171990963) internal successors, (22798), 6214 states have internal predecessors, (22798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 22798 transitions. [2022-11-20 12:35:23,638 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 22798 transitions. Word has length 17 [2022-11-20 12:35:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:35:23,638 INFO L495 AbstractCegarLoop]: Abstraction has 6215 states and 22798 transitions. [2022-11-20 12:35:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 22798 transitions. [2022-11-20 12:35:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:35:23,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:35:23,641 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:35:23,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:35:23,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:35:23,842 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:35:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:35:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 734212994, now seen corresponding path program 4 times [2022-11-20 12:35:23,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:35:23,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659839473] [2022-11-20 12:35:23,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:35:23,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:35:23,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:35:23,844 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:35:23,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:35:24,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:35:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:35:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:35:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:35:24,293 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:35:24,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:35:24,397 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:35:24,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:35:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:35:24,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:35:24,796 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:35:24,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:35:24,886 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 12:35:24,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-11-20 12:35:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:35:25,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:35:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:35:29,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:35:29,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659839473] [2022-11-20 12:35:29,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659839473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:35:29,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:35:29,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 12:35:29,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648799753] [2022-11-20 12:35:29,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:35:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:35:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:35:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:35:29,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:35:29,602 INFO L87 Difference]: Start difference. First operand 6215 states and 22798 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:35:39,735 INFO L93 Difference]: Finished difference Result 6255 states and 22926 transitions. [2022-11-20 12:35:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:35:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:35:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:35:39,752 INFO L225 Difference]: With dead ends: 6255 [2022-11-20 12:35:39,752 INFO L226 Difference]: Without dead ends: 6255 [2022-11-20 12:35:39,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=122, Invalid=578, Unknown=2, NotChecked=0, Total=702 [2022-11-20 12:35:39,753 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:35:39,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 247 Unchecked, 0.3s Time] [2022-11-20 12:35:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2022-11-20 12:35:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 6217. [2022-11-20 12:35:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6217 states, 6200 states have (on average 3.6770967741935485) internal successors, (22798), 6216 states have internal predecessors, (22798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6217 states to 6217 states and 22798 transitions. [2022-11-20 12:35:39,874 INFO L78 Accepts]: Start accepts. Automaton has 6217 states and 22798 transitions. Word has length 17 [2022-11-20 12:35:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:35:39,874 INFO L495 AbstractCegarLoop]: Abstraction has 6217 states and 22798 transitions. [2022-11-20 12:35:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:35:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 6217 states and 22798 transitions. [2022-11-20 12:35:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:35:39,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:35:39,876 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:35:39,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:35:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:35:40,077 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:35:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:35:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1085876204, now seen corresponding path program 1 times [2022-11-20 12:35:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:35:40,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570100557] [2022-11-20 12:35:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:35:40,078 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 12:35:40,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:35:40,080 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:35:40,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:35:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:35:40,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:35:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:35:40,465 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:35:40,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:35:40,576 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:35:40,577 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:35:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:35:40,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:35:41,035 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:35:41,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:35:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:35:41,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:35:41,594 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 12:35:41,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:35:48,450 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 12:35:48,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:35:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570100557] [2022-11-20 12:35:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570100557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:35:48,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:35:48,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:35:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207997067] [2022-11-20 12:35:48,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:35:48,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:35:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:35:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:35:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:35:48,452 INFO L87 Difference]: Start difference. First operand 6217 states and 22798 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:01,591 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:36:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:02,979 INFO L93 Difference]: Finished difference Result 7209 states and 25610 transitions. [2022-11-20 12:36:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:36:02,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:36:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:03,002 INFO L225 Difference]: With dead ends: 7209 [2022-11-20 12:36:03,002 INFO L226 Difference]: Without dead ends: 7209 [2022-11-20 12:36:03,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2022-11-20 12:36:03,003 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 125 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:03,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 129 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 383 Unchecked, 1.6s Time] [2022-11-20 12:36:03,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7209 states. [2022-11-20 12:36:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7209 to 6595. [2022-11-20 12:36:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6595 states, 6578 states have (on average 3.6550623289753723) internal successors, (24043), 6594 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6595 states to 6595 states and 24043 transitions. [2022-11-20 12:36:03,190 INFO L78 Accepts]: Start accepts. Automaton has 6595 states and 24043 transitions. Word has length 17 [2022-11-20 12:36:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 6595 states and 24043 transitions. [2022-11-20 12:36:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6595 states and 24043 transitions. [2022-11-20 12:36:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:36:03,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:03,195 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:03,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:03,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:03,410 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:36:03,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:03,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1734825948, now seen corresponding path program 2 times [2022-11-20 12:36:03,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:36:03,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835009020] [2022-11-20 12:36:03,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:36:03,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:36:03,412 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:36:03,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:36:03,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:36:03,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:36:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:36:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:03,744 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:36:03,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:36:03,861 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:36:03,862 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:36:04,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:04,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:36:04,212 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:36:04,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:36:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:04,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:36:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:36:04,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:36:04,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:36:04,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835009020] [2022-11-20 12:36:04,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835009020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:36:04,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:36:04,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:36:04,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260735495] [2022-11-20 12:36:04,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:36:04,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:36:04,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:36:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:36:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:36:04,747 INFO L87 Difference]: Start difference. First operand 6595 states and 24043 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:05,544 INFO L93 Difference]: Finished difference Result 6845 states and 25081 transitions. [2022-11-20 12:36:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:36:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:36:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:05,565 INFO L225 Difference]: With dead ends: 6845 [2022-11-20 12:36:05,565 INFO L226 Difference]: Without dead ends: 6845 [2022-11-20 12:36:05,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:36:05,566 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:05,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-20 12:36:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2022-11-20 12:36:05,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6727. [2022-11-20 12:36:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6710 states have (on average 3.6827123695976156) internal successors, (24711), 6726 states have internal predecessors, (24711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 24711 transitions. [2022-11-20 12:36:05,703 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 24711 transitions. Word has length 17 [2022-11-20 12:36:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:05,703 INFO L495 AbstractCegarLoop]: Abstraction has 6727 states and 24711 transitions. [2022-11-20 12:36:05,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 24711 transitions. [2022-11-20 12:36:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:36:05,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:05,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:05,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:36:05,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:05,907 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:36:05,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1734825978, now seen corresponding path program 1 times [2022-11-20 12:36:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:36:05,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855517482] [2022-11-20 12:36:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:05,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:36:05,909 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:36:05,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:36:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:06,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:36:06,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:06,300 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:36:06,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:36:06,412 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:36:06,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:36:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:06,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:36:06,855 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:36:06,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:36:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:06,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:36:07,437 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 12:36:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:23,908 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 12:36:23,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:36:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855517482] [2022-11-20 12:36:23,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855517482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:23,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:36:23,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:36:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098097227] [2022-11-20 12:36:23,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:23,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:36:23,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:36:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:36:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:36:23,910 INFO L87 Difference]: Start difference. First operand 6727 states and 24711 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:41,480 WARN L233 SmtUtils]: Spent 8.99s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:36:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:36:42,346 INFO L93 Difference]: Finished difference Result 7064 states and 25782 transitions. [2022-11-20 12:36:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:36:42,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:36:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:36:42,367 INFO L225 Difference]: With dead ends: 7064 [2022-11-20 12:36:42,367 INFO L226 Difference]: Without dead ends: 7064 [2022-11-20 12:36:42,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=80, Invalid=337, Unknown=3, NotChecked=0, Total=420 [2022-11-20 12:36:42,367 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:36:42,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 106 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 371 Unchecked, 0.9s Time] [2022-11-20 12:36:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2022-11-20 12:36:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 6814. [2022-11-20 12:36:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6814 states, 6797 states have (on average 3.676180667941739) internal successors, (24987), 6813 states have internal predecessors, (24987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6814 states to 6814 states and 24987 transitions. [2022-11-20 12:36:42,498 INFO L78 Accepts]: Start accepts. Automaton has 6814 states and 24987 transitions. Word has length 17 [2022-11-20 12:36:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:36:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 6814 states and 24987 transitions. [2022-11-20 12:36:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:36:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6814 states and 24987 transitions. [2022-11-20 12:36:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:36:42,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:36:42,501 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:36:42,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-20 12:36:42,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:42,703 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:36:42,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:36:42,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1738381802, now seen corresponding path program 1 times [2022-11-20 12:36:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:36:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981097725] [2022-11-20 12:36:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:36:42,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:36:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:36:42,705 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:36:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:36:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:36:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:36:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:36:43,110 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:36:43,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:36:43,211 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:36:43,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:36:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:43,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:36:43,619 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:36:43,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:36:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:36:43,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:36:44,259 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 12:36:44,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:36:55,937 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 12:36:55,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:36:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981097725] [2022-11-20 12:36:55,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981097725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:36:55,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:36:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:36:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446317081] [2022-11-20 12:36:55,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:36:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:36:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:36:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:36:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:36:55,939 INFO L87 Difference]: Start difference. First operand 6814 states and 24987 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:14,064 INFO L93 Difference]: Finished difference Result 7853 states and 27956 transitions. [2022-11-20 12:37:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:37:14,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:37:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:14,086 INFO L225 Difference]: With dead ends: 7853 [2022-11-20 12:37:14,087 INFO L226 Difference]: Without dead ends: 7853 [2022-11-20 12:37:14,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:37:14,087 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:14,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 144 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 688 Unchecked, 1.5s Time] [2022-11-20 12:37:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2022-11-20 12:37:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 6858. [2022-11-20 12:37:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6841 states have (on average 3.6759245724309313) internal successors, (25147), 6857 states have internal predecessors, (25147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 25147 transitions. [2022-11-20 12:37:14,233 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 25147 transitions. Word has length 17 [2022-11-20 12:37:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:14,234 INFO L495 AbstractCegarLoop]: Abstraction has 6858 states and 25147 transitions. [2022-11-20 12:37:14,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:14,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 25147 transitions. [2022-11-20 12:37:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:37:14,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:14,237 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:14,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:37:14,437 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:37:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 865157248, now seen corresponding path program 2 times [2022-11-20 12:37:14,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:37:14,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624550905] [2022-11-20 12:37:14,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:37:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:37:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:37:14,439 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:37:14,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:14,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:37:14,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:37:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:37:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:14,845 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:37:14,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:37:14,969 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:37:14,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:37:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:15,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:37:15,255 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:37:15,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:37:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:15,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:37:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:37:15,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:37:15,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:37:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624550905] [2022-11-20 12:37:15,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624550905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:37:15,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:37:15,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:37:15,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835344867] [2022-11-20 12:37:15,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:37:15,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:37:15,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:37:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:37:15,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:37:15,822 INFO L87 Difference]: Start difference. First operand 6858 states and 25147 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:16,635 INFO L93 Difference]: Finished difference Result 7065 states and 25785 transitions. [2022-11-20 12:37:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:37:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:37:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:16,656 INFO L225 Difference]: With dead ends: 7065 [2022-11-20 12:37:16,656 INFO L226 Difference]: Without dead ends: 7065 [2022-11-20 12:37:16,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:37:16,657 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:16,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 29 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-11-20 12:37:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2022-11-20 12:37:16,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 6858. [2022-11-20 12:37:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6841 states have (on average 3.6756322175120597) internal successors, (25145), 6857 states have internal predecessors, (25145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 25145 transitions. [2022-11-20 12:37:16,814 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 25145 transitions. Word has length 17 [2022-11-20 12:37:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:16,814 INFO L495 AbstractCegarLoop]: Abstraction has 6858 states and 25145 transitions. [2022-11-20 12:37:16,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 25145 transitions. [2022-11-20 12:37:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:37:16,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:16,817 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:16,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:37:17,018 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:37:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 549867253, now seen corresponding path program 1 times [2022-11-20 12:37:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:37:17,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316753021] [2022-11-20 12:37:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:17,019 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 12:37:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:37:17,020 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:37:17,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:37:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:17,476 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:37:17,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:37:17,589 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:37:17,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:37:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:17,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:37:18,012 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:37:18,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:37:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:18,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:37:18,602 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 12:37:18,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:25,794 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 12:37:25,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:37:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316753021] [2022-11-20 12:37:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316753021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:25,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:37:25,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:37:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387335766] [2022-11-20 12:37:25,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:25,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:37:25,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:37:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:37:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:37:25,796 INFO L87 Difference]: Start difference. First operand 6858 states and 25145 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:39,985 WARN L233 SmtUtils]: Spent 8.62s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 12:37:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:37:41,049 INFO L93 Difference]: Finished difference Result 7021 states and 25582 transitions. [2022-11-20 12:37:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:37:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:37:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:37:41,070 INFO L225 Difference]: With dead ends: 7021 [2022-11-20 12:37:41,070 INFO L226 Difference]: Without dead ends: 7021 [2022-11-20 12:37:41,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=72, Invalid=306, Unknown=2, NotChecked=0, Total=380 [2022-11-20 12:37:41,070 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:37:41,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 93 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 377 Unchecked, 1.1s Time] [2022-11-20 12:37:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7021 states. [2022-11-20 12:37:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7021 to 6858. [2022-11-20 12:37:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6841 states have (on average 3.6754860400526237) internal successors, (25144), 6857 states have internal predecessors, (25144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 25144 transitions. [2022-11-20 12:37:41,204 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 25144 transitions. Word has length 17 [2022-11-20 12:37:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:37:41,204 INFO L495 AbstractCegarLoop]: Abstraction has 6858 states and 25144 transitions. [2022-11-20 12:37:41,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:37:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 25144 transitions. [2022-11-20 12:37:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:37:41,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:37:41,207 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:37:41,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:41,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:37:41,408 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:37:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:37:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash 549863099, now seen corresponding path program 1 times [2022-11-20 12:37:41,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:37:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539801997] [2022-11-20 12:37:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:37:41,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:37:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:37:41,410 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:37:41,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:37:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:37:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:37:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:37:41,850 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:37:41,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:37:41,971 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:37:41,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:37:42,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:42,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:37:42,390 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:37:42,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:37:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:37:42,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:37:43,031 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 12:37:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:37:45,441 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_~X_0~0.offset))) (and (or (bvule (bvadd (_ bv4 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t3~0.base_154| (_ BitVec 32))) (or (forall ((v_ArrVal_2583 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t3~0.base_154| v_ArrVal_2583) c_~X_0~0.base))) (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_154|)))))) is different from false [2022-11-20 12:37:49,835 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 12:37:49,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:37:49,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539801997] [2022-11-20 12:37:49,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539801997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:37:49,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:37:49,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:37:49,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776904409] [2022-11-20 12:37:49,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:37:49,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:37:49,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:37:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:37:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2022-11-20 12:37:49,837 INFO L87 Difference]: Start difference. First operand 6858 states and 25144 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:01,808 INFO L93 Difference]: Finished difference Result 7793 states and 27883 transitions. [2022-11-20 12:38:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:38:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:01,831 INFO L225 Difference]: With dead ends: 7793 [2022-11-20 12:38:01,831 INFO L226 Difference]: Without dead ends: 7793 [2022-11-20 12:38:01,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=72, Invalid=273, Unknown=1, NotChecked=34, Total=380 [2022-11-20 12:38:01,831 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 801 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:01,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 149 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 801 Unchecked, 1.8s Time] [2022-11-20 12:38:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-11-20 12:38:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6830. [2022-11-20 12:38:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6830 states, 6813 states have (on average 3.678262145897549) internal successors, (25060), 6829 states have internal predecessors, (25060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6830 states to 6830 states and 25060 transitions. [2022-11-20 12:38:01,974 INFO L78 Accepts]: Start accepts. Automaton has 6830 states and 25060 transitions. Word has length 17 [2022-11-20 12:38:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:01,975 INFO L495 AbstractCegarLoop]: Abstraction has 6830 states and 25060 transitions. [2022-11-20 12:38:01,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6830 states and 25060 transitions. [2022-11-20 12:38:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:38:01,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:01,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:01,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 12:38:02,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:02,178 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash -217501188, now seen corresponding path program 2 times [2022-11-20 12:38:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:02,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209072251] [2022-11-20 12:38:02,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:38:02,179 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 12:38:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:02,180 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:02,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:02,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:38:02,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:38:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:38:02,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:02,566 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:38:02,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:38:02,687 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:02,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:02,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:02,999 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:03,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:38:03,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:38:03,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:03,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209072251] [2022-11-20 12:38:03,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209072251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:38:03,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:38:03,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:38:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144339138] [2022-11-20 12:38:03,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:38:03,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:38:03,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:38:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:38:03,578 INFO L87 Difference]: Start difference. First operand 6830 states and 25060 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:04,408 INFO L93 Difference]: Finished difference Result 6936 states and 25364 transitions. [2022-11-20 12:38:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:38:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:04,429 INFO L225 Difference]: With dead ends: 6936 [2022-11-20 12:38:04,429 INFO L226 Difference]: Without dead ends: 6936 [2022-11-20 12:38:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:38:04,429 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 83 Unchecked, 0.6s Time] [2022-11-20 12:38:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2022-11-20 12:38:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6785. [2022-11-20 12:38:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6785 states, 6768 states have (on average 3.680998817966903) internal successors, (24913), 6784 states have internal predecessors, (24913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6785 states to 6785 states and 24913 transitions. [2022-11-20 12:38:04,563 INFO L78 Accepts]: Start accepts. Automaton has 6785 states and 24913 transitions. Word has length 17 [2022-11-20 12:38:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:04,563 INFO L495 AbstractCegarLoop]: Abstraction has 6785 states and 24913 transitions. [2022-11-20 12:38:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6785 states and 24913 transitions. [2022-11-20 12:38:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:38:04,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:04,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:04,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:04,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:04,769 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash -221057012, now seen corresponding path program 3 times [2022-11-20 12:38:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942209210] [2022-11-20 12:38:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:38:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:04,770 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:04,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:05,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 12:38:05,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:38:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:38:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:05,198 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:38:05,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:38:05,332 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:05,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:05,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:05,636 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:05,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:05,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:38:06,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:38:06,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:06,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942209210] [2022-11-20 12:38:06,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942209210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:38:06,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:38:06,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:38:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742348619] [2022-11-20 12:38:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:38:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:38:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:38:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:38:06,208 INFO L87 Difference]: Start difference. First operand 6785 states and 24913 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:07,151 INFO L93 Difference]: Finished difference Result 6934 states and 25364 transitions. [2022-11-20 12:38:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:38:07,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:07,171 INFO L225 Difference]: With dead ends: 6934 [2022-11-20 12:38:07,171 INFO L226 Difference]: Without dead ends: 6934 [2022-11-20 12:38:07,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:38:07,172 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:07,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-20 12:38:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2022-11-20 12:38:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6783. [2022-11-20 12:38:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6783 states, 6766 states have (on average 3.680904522613065) internal successors, (24905), 6782 states have internal predecessors, (24905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:07,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6783 states to 6783 states and 24905 transitions. [2022-11-20 12:38:07,304 INFO L78 Accepts]: Start accepts. Automaton has 6783 states and 24905 transitions. Word has length 17 [2022-11-20 12:38:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:07,305 INFO L495 AbstractCegarLoop]: Abstraction has 6783 states and 24905 transitions. [2022-11-20 12:38:07,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6783 states and 24905 transitions. [2022-11-20 12:38:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:38:07,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:07,308 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:07,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 12:38:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:07,508 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash -536347007, now seen corresponding path program 2 times [2022-11-20 12:38:07,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81739122] [2022-11-20 12:38:07,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:38:07,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:07,510 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:07,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:07,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:38:07,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:38:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:38:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:07,929 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:38:07,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:38:08,046 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:08,046 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:08,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:08,360 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:08,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:08,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:38:08,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:38:08,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:08,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81739122] [2022-11-20 12:38:08,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81739122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:38:08,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:38:08,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:38:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610401682] [2022-11-20 12:38:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:38:08,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:38:08,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:38:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:38:08,946 INFO L87 Difference]: Start difference. First operand 6783 states and 24905 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:09,906 INFO L93 Difference]: Finished difference Result 6959 states and 25362 transitions. [2022-11-20 12:38:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:38:09,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:09,933 INFO L225 Difference]: With dead ends: 6959 [2022-11-20 12:38:09,933 INFO L226 Difference]: Without dead ends: 6959 [2022-11-20 12:38:09,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:38:09,934 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:09,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-20 12:38:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2022-11-20 12:38:10,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6782. [2022-11-20 12:38:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6782 states, 6765 states have (on average 3.6810051736881007) internal successors, (24902), 6781 states have internal predecessors, (24902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6782 states to 6782 states and 24902 transitions. [2022-11-20 12:38:10,072 INFO L78 Accepts]: Start accepts. Automaton has 6782 states and 24902 transitions. Word has length 17 [2022-11-20 12:38:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:10,072 INFO L495 AbstractCegarLoop]: Abstraction has 6782 states and 24902 transitions. [2022-11-20 12:38:10,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6782 states and 24902 transitions. [2022-11-20 12:38:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:38:10,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:10,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:10,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:10,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:10,275 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash -536351161, now seen corresponding path program 2 times [2022-11-20 12:38:10,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:10,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110140732] [2022-11-20 12:38:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:38:10,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:10,277 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:10,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 12:38:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:38:10,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:38:10,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:10,668 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-11-20 12:38:10,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 31 [2022-11-20 12:38:10,791 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:10,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:11,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:11,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:11,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:11,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:11,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 12:38:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:38:11,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:38:11,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:11,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110140732] [2022-11-20 12:38:11,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110140732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:38:11,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:38:11,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:38:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125930800] [2022-11-20 12:38:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:38:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:38:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:38:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:38:11,710 INFO L87 Difference]: Start difference. First operand 6782 states and 24902 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:12,661 INFO L93 Difference]: Finished difference Result 6922 states and 25298 transitions. [2022-11-20 12:38:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:38:12,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:12,681 INFO L225 Difference]: With dead ends: 6922 [2022-11-20 12:38:12,681 INFO L226 Difference]: Without dead ends: 6922 [2022-11-20 12:38:12,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:38:12,682 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:12,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-11-20 12:38:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2022-11-20 12:38:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 6781. [2022-11-20 12:38:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6764 states have (on average 3.6809580130100534) internal successors, (24898), 6780 states have internal predecessors, (24898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 24898 transitions. [2022-11-20 12:38:12,815 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 24898 transitions. Word has length 17 [2022-11-20 12:38:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 6781 states and 24898 transitions. [2022-11-20 12:38:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 24898 transitions. [2022-11-20 12:38:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:38:12,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:12,818 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:12,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:13,019 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -184552634, now seen corresponding path program 1 times [2022-11-20 12:38:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661464688] [2022-11-20 12:38:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:38:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:13,021 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:13,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:38:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:38:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:13,474 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:38:13,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:38:13,587 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:13,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:13,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 12:38:14,005 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:14,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:14,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:38:14,610 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 12:38:14,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:38:21,863 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 12:38:21,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:21,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661464688] [2022-11-20 12:38:21,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661464688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:38:21,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:38:21,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 12:38:21,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057179537] [2022-11-20 12:38:21,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:38:21,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:38:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:38:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=194, Unknown=1, NotChecked=0, Total=240 [2022-11-20 12:38:21,865 INFO L87 Difference]: Start difference. First operand 6781 states and 24898 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:37,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:38:37,196 INFO L93 Difference]: Finished difference Result 7161 states and 25974 transitions. [2022-11-20 12:38:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:38:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:38:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:38:37,217 INFO L225 Difference]: With dead ends: 7161 [2022-11-20 12:38:37,218 INFO L226 Difference]: Without dead ends: 7161 [2022-11-20 12:38:37,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=75, Invalid=302, Unknown=3, NotChecked=0, Total=380 [2022-11-20 12:38:37,218 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:38:37,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 130 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 345 Unchecked, 0.8s Time] [2022-11-20 12:38:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7161 states. [2022-11-20 12:38:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7161 to 6811. [2022-11-20 12:38:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6794 states have (on average 3.676479246393877) internal successors, (24978), 6810 states have internal predecessors, (24978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 24978 transitions. [2022-11-20 12:38:37,354 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 24978 transitions. Word has length 17 [2022-11-20 12:38:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:38:37,354 INFO L495 AbstractCegarLoop]: Abstraction has 6811 states and 24978 transitions. [2022-11-20 12:38:37,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:38:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 24978 transitions. [2022-11-20 12:38:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:38:37,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:38:37,357 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:38:37,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-20 12:38:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:37,558 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:38:37,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:38:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash -310465737, now seen corresponding path program 6 times [2022-11-20 12:38:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:38:37,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936739808] [2022-11-20 12:38:37,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:38:37,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:38:37,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:38:37,560 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:38:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:38:37,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 12:38:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:38:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 12:38:37,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:38:38,076 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 12:38:38,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 12:38:38,178 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:38:38,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:38:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:38:38,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 12:38:38,503 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:38:38,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:38:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:38:38,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:38:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:38:43,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:38:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936739808] [2022-11-20 12:38:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936739808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:38:43,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:38:43,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-20 12:38:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756751455] [2022-11-20 12:38:43,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:38:43,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:38:43,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:38:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:38:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:38:43,638 INFO L87 Difference]: Start difference. First operand 6811 states and 24978 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:01,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:39:02,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:39:06,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 12:39:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:07,133 INFO L93 Difference]: Finished difference Result 10712 states and 39102 transitions. [2022-11-20 12:39:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:39:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 12:39:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:07,163 INFO L225 Difference]: With dead ends: 10712 [2022-11-20 12:39:07,163 INFO L226 Difference]: Without dead ends: 10712 [2022-11-20 12:39:07,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:39:07,163 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 599 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:07,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 357 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1832 Invalid, 0 Unknown, 616 Unchecked, 18.4s Time] [2022-11-20 12:39:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10712 states. [2022-11-20 12:39:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10712 to 7082. [2022-11-20 12:39:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 7065 states have (on average 3.721443736730361) internal successors, (26292), 7081 states have internal predecessors, (26292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 26292 transitions. [2022-11-20 12:39:07,337 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 26292 transitions. Word has length 18 [2022-11-20 12:39:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:07,338 INFO L495 AbstractCegarLoop]: Abstraction has 7082 states and 26292 transitions. [2022-11-20 12:39:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 26292 transitions. [2022-11-20 12:39:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:39:07,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:07,341 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:07,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-20 12:39:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:39:07,541 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 12:39:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash 33665807, now seen corresponding path program 7 times [2022-11-20 12:39:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:39:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203758760] [2022-11-20 12:39:07,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:39:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:39:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:39:07,544 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 12:39:07,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b594d71b-c7a8-4a03-a477-702a01e4da98/bin/uautomizer-ug76WZFUDN/mathsat -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 12:39:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 12:39:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:39:08,108 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 12:39:08,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 12:39:08,218 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 12:39:08,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-20 12:39:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:39:09,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 12:39:09,315 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 12:39:09,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 12:39:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:09,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:39:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:15,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:39:15,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203758760] [2022-11-20 12:39:15,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203758760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:39:15,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:39:15,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-20 12:39:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632832785] [2022-11-20 12:39:15,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:39:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:39:15,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:39:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:39:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:39:15,285 INFO L87 Difference]: Start difference. First operand 7082 states and 26292 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)