./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:49:50,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:49:50,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:49:50,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:49:50,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:49:50,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:49:50,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:49:50,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:49:50,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:49:50,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:49:50,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:49:50,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:49:50,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:49:50,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:49:50,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:49:50,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:49:50,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:49:50,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:49:50,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:49:50,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:49:50,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:49:50,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:49:50,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:49:50,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:49:50,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:49:50,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:49:50,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:49:50,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:49:50,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:49:50,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:49:50,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:49:50,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:49:50,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:49:50,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:49:50,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:49:50,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:49:50,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:49:50,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:49:50,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:49:50,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:49:50,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:49:50,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:49:50,910 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:49:50,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:49:50,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:49:50,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:49:50,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:49:50,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:49:50,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:49:50,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:49:50,913 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:49:50,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:49:50,914 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:49:50,914 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:49:50,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:49:50,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:49:50,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:49:50,915 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:49:50,916 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:49:50,916 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:49:50,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:49:50,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:49:50,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:49:50,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:49:50,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:49:50,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:49:50,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:49:50,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:49:50,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:49:50,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:49:50,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:49:50,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:49:50,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-11-20 10:49:51,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:49:51,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:49:51,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:49:51,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:49:51,191 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:49:51,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 10:49:54,288 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:49:54,507 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:49:54,508 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 10:49:54,515 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/493a9e043/ae9f107c2291421bb6cf8e62319ebba4/FLAG89d7c4323 [2022-11-20 10:49:54,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/493a9e043/ae9f107c2291421bb6cf8e62319ebba4 [2022-11-20 10:49:54,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:49:54,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:49:54,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:54,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:49:54,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:49:54,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:54" (1/1) ... [2022-11-20 10:49:54,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23317f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:54, skipping insertion in model container [2022-11-20 10:49:54,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:49:54" (1/1) ... [2022-11-20 10:49:54,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:49:54,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:49:54,851 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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 10:49:54,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:49:54,884 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 10:49:54,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ebcb5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:49:54, skipping insertion in model container [2022-11-20 10:49:54,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:49:54,886 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 10:49:54,888 INFO L158 Benchmark]: Toolchain (without parser) took 341.29ms. Allocated memory is still 172.0MB. Free memory was 130.9MB in the beginning and 120.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:49:54,889 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 76.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:49:54,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.18ms. Allocated memory is still 172.0MB. Free memory was 130.9MB in the beginning and 120.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:49:54,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 76.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.18ms. Allocated memory is still 172.0MB. Free memory was 130.9MB in the beginning and 120.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 79]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:49:57,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:49:57,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:49:57,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:49:57,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:49:57,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:49:57,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:49:57,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:49:57,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:49:57,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:49:57,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:49:57,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:49:57,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:49:57,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:49:57,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:49:57,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:49:57,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:49:57,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:49:57,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:49:57,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:49:57,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:49:57,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:49:57,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:49:57,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:49:57,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:49:57,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:49:57,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:49:57,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:49:57,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:49:57,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:49:57,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:49:57,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:49:57,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:49:57,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:49:57,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:49:57,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:49:57,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:49:57,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:49:57,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:49:57,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:49:57,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:49:57,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 10:49:57,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:49:57,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:49:57,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:49:57,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:49:57,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:49:57,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:49:57,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:49:57,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:49:57,352 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:49:57,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:49:57,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:49:57,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:49:57,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:49:57,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:49:57,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:49:57,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:49:57,355 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:49:57,355 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:49:57,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:49:57,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:49:57,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 10:49:57,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 10:49:57,356 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:49:57,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:49:57,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:49:57,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:49:57,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:49:57,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:49:57,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:49:57,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:49:57,358 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 10:49:57,358 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 10:49:57,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 10:49:57,359 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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bf204635285748ea2bd88f763410b9afff54eeccde3aa0a970ff723633af9c2 [2022-11-20 10:49:57,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:49:57,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:49:57,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:49:57,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:49:57,746 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:49:57,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 10:50:00,824 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:01,101 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:01,102 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c [2022-11-20 10:50:01,108 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/9e260d526/f4512df7365342d69b28c3b7792b5c27/FLAGc756cfe67 [2022-11-20 10:50:01,121 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/data/9e260d526/f4512df7365342d69b28c3b7792b5c27 [2022-11-20 10:50:01,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:01,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:01,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:01,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:01,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:01,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7bba28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01, skipping insertion in model container [2022-11-20 10:50:01,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:01,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:01,355 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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 10:50:01,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:01,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 10:50:01,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:01,452 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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 10:50:01,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:01,471 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:01,514 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_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/sv-benchmarks/c/weaver/loop-tiling-eq.wvr.c[2618,2631] [2022-11-20 10:50:01,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:01,544 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:01,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01 WrapperNode [2022-11-20 10:50:01,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:01,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:01,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:01,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:01,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,666 INFO L138 Inliner]: procedures = 27, calls = 41, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 179 [2022-11-20 10:50:01,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:01,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:01,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:01,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:01,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,733 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:01,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:01,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:01,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:01,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (1/1) ... [2022-11-20 10:50:01,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:01,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:01,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:01,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:01,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 10:50:01,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:50:01,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:50:01,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 10:50:01,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:50:01,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:50:01,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:50:01,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:50:01,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:50:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:50:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:01,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:50:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 10:50:01,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:50:02,048 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:02,050 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:50:03,118 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:50:03,129 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:50:03,129 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 10:50:03,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:03 BoogieIcfgContainer [2022-11-20 10:50:03,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:50:03,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:50:03,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:50:03,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:50:03,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:01" (1/3) ... [2022-11-20 10:50:03,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cab39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:03, skipping insertion in model container [2022-11-20 10:50:03,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:01" (2/3) ... [2022-11-20 10:50:03,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cab39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:03, skipping insertion in model container [2022-11-20 10:50:03,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:03" (3/3) ... [2022-11-20 10:50:03,141 INFO L112 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.c [2022-11-20 10:50:03,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:50:03,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-20 10:50:03,162 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:50:03,255 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:50:03,309 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:50:03,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 308 transitions, 632 flow [2022-11-20 10:50:03,327 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 308 transitions, 632 flow [2022-11-20 10:50:03,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 308 transitions, 632 flow [2022-11-20 10:50:03,430 INFO L130 PetriNetUnfolder]: 26/306 cut-off events. [2022-11-20 10:50:03,430 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:50:03,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 306 events. 26/306 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 438 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 223. Up to 2 conditions per place. [2022-11-20 10:50:03,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2022-11-20 10:51:55,370 WARN L233 SmtUtils]: Spent 9.35s on a formula simplification. DAG size of input: 120 DAG size of output: 118 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 10:52:26,555 WARN L233 SmtUtils]: Spent 14.29s on a formula simplification. DAG size of input: 133 DAG size of output: 130 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 10:52:31,656 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 10:52:47,079 WARN L233 SmtUtils]: Spent 15.42s on a formula simplification. DAG size of input: 145 DAG size of output: 142 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 10:52:51,364 INFO L134 LiptonReduction]: Checked pairs total: 4014 [2022-11-20 10:52:51,364 INFO L136 LiptonReduction]: Total number of compositions: 352 [2022-11-20 10:52:51,372 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 64 transitions, 144 flow [2022-11-20 10:52:51,425 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 489 states, 343 states have (on average 3.7346938775510203) internal successors, (1281), 488 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:51,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:52:51,450 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;@c29a5ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:52:51,450 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-11-20 10:52:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 489 states, 343 states have (on average 3.7346938775510203) internal successors, (1281), 488 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:52:51,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:51,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:52:51,461 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 10:52:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash 36757, now seen corresponding path program 1 times [2022-11-20 10:52:51,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:51,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914377269] [2022-11-20 10:52:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:51,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:51,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:52:51,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 10:52:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:52:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:51,851 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 10:52:51,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:52:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:51,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:51,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914377269] [2022-11-20 10:52:51,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914377269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:51,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:51,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:52:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246060822] [2022-11-20 10:52:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:52:51,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:52:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:52:51,941 INFO L87 Difference]: Start difference. First operand has 489 states, 343 states have (on average 3.7346938775510203) internal successors, (1281), 488 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:52,851 INFO L93 Difference]: Finished difference Result 485 states and 1277 transitions. [2022-11-20 10:52:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:52:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:52:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:52,874 INFO L225 Difference]: With dead ends: 485 [2022-11-20 10:52:52,874 INFO L226 Difference]: Without dead ends: 485 [2022-11-20 10:52:52,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:52:52,879 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:52,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 2 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:52:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-20 10:52:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2022-11-20 10:52:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 343 states have (on average 3.7230320699708455) internal successors, (1277), 484 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1277 transitions. [2022-11-20 10:52:52,960 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1277 transitions. Word has length 2 [2022-11-20 10:52:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:52,960 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 1277 transitions. [2022-11-20 10:52:52,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1277 transitions. [2022-11-20 10:52:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:52:52,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:52,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:52:52,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:53,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:53,176 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 10:52:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 36758, now seen corresponding path program 1 times [2022-11-20 10:52:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963263681] [2022-11-20 10:52:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:53,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:53,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:52:53,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 10:52:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:52:53,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:53,543 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 10:52:53,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:52:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:53,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:52:53,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963263681] [2022-11-20 10:52:53,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963263681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:52:53,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:52:53,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:52:53,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543919811] [2022-11-20 10:52:53,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:53,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:52:53,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:53,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:52:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:52:53,615 INFO L87 Difference]: Start difference. First operand 485 states and 1277 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:55,618 INFO L93 Difference]: Finished difference Result 966 states and 2550 transitions. [2022-11-20 10:52:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:52:55,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:52:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:55,630 INFO L225 Difference]: With dead ends: 966 [2022-11-20 10:52:55,630 INFO L226 Difference]: Without dead ends: 966 [2022-11-20 10:52:55,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:52:55,632 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 7 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 10:52:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-11-20 10:52:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 488. [2022-11-20 10:52:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 346 states have (on average 3.713872832369942) internal successors, (1285), 487 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1285 transitions. [2022-11-20 10:52:55,670 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1285 transitions. Word has length 2 [2022-11-20 10:52:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:55,671 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 1285 transitions. [2022-11-20 10:52:55,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1285 transitions. [2022-11-20 10:52:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:52:55,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:55,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:52:55,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:52:55,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:55,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:52:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:55,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1146155, now seen corresponding path program 1 times [2022-11-20 10:52:55,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:52:55,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047359361] [2022-11-20 10:52:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:55,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:52:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:52:55,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:52:55,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 10:52:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:52:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:56,285 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 10:52:56,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:52:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:56,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:52:56,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:52:56,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047359361] [2022-11-20 10:52:56,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047359361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:56,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:56,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 10:52:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145339650] [2022-11-20 10:52:56,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:52:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:52:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:52:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:56,997 INFO L87 Difference]: Start difference. First operand 488 states and 1285 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:59,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:02,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:05,420 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2022-11-20 10:53:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:53:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:53:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:05,434 INFO L225 Difference]: With dead ends: 1453 [2022-11-20 10:53:05,434 INFO L226 Difference]: Without dead ends: 1453 [2022-11-20 10:53:05,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:53:05,436 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 197 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:05,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 14 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-20 10:53:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-11-20 10:53:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 497. [2022-11-20 10:53:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 355 states have (on average 3.687323943661972) internal successors, (1309), 496 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1309 transitions. [2022-11-20 10:53:05,466 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1309 transitions. Word has length 3 [2022-11-20 10:53:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:05,467 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1309 transitions. [2022-11-20 10:53:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1309 transitions. [2022-11-20 10:53:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:53:05,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:05,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:53:05,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:05,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:05,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash 35604477, now seen corresponding path program 1 times [2022-11-20 10:53:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:05,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817929745] [2022-11-20 10:53:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:05,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:05,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:05,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:05,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 10:53:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:53:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:06,040 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-20 10:53:06,041 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 10:53:06,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:06,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:53:06,303 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:53:06,304 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 10:53:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:06,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:06,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817929745] [2022-11-20 10:53:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817929745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:06,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:06,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354224452] [2022-11-20 10:53:06,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:53:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:53:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:06,358 INFO L87 Difference]: Start difference. First operand 497 states and 1309 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:07,254 INFO L93 Difference]: Finished difference Result 400 states and 1012 transitions. [2022-11-20 10:53:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:53:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:07,261 INFO L225 Difference]: With dead ends: 400 [2022-11-20 10:53:07,261 INFO L226 Difference]: Without dead ends: 400 [2022-11-20 10:53:07,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:07,262 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:07,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.9s Time] [2022-11-20 10:53:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-20 10:53:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-20 10:53:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 294 states have (on average 3.442176870748299) internal successors, (1012), 399 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1012 transitions. [2022-11-20 10:53:07,276 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1012 transitions. Word has length 4 [2022-11-20 10:53:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:07,276 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 1012 transitions. [2022-11-20 10:53:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1012 transitions. [2022-11-20 10:53:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:53:07,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:07,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:53:07,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:53:07,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:07,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash 35604479, now seen corresponding path program 1 times [2022-11-20 10:53:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:07,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598527926] [2022-11-20 10:53:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:07,492 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:07,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 10:53:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:53:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:07,797 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 10:53:07,798 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 10:53:07,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 10:53:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:07,943 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 10:53:08,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:08,007 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 10:53:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:08,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:08,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:08,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598527926] [2022-11-20 10:53:08,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598527926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:08,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:08,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110942861] [2022-11-20 10:53:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:08,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:53:08,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:53:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:08,094 INFO L87 Difference]: Start difference. First operand 400 states and 1012 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:08,947 INFO L93 Difference]: Finished difference Result 303 states and 715 transitions. [2022-11-20 10:53:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:53:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:08,955 INFO L225 Difference]: With dead ends: 303 [2022-11-20 10:53:08,955 INFO L226 Difference]: Without dead ends: 303 [2022-11-20 10:53:08,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:08,956 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:08,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 2 Unchecked, 0.8s Time] [2022-11-20 10:53:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-20 10:53:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-11-20 10:53:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 233 states have (on average 3.0686695278969958) internal successors, (715), 302 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 715 transitions. [2022-11-20 10:53:08,967 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 715 transitions. Word has length 4 [2022-11-20 10:53:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:08,967 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 715 transitions. [2022-11-20 10:53:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 715 transitions. [2022-11-20 10:53:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:53:08,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:08,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:53:08,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:09,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1103743263, now seen corresponding path program 1 times [2022-11-20 10:53:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:09,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273252209] [2022-11-20 10:53:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:09,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:09,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:09,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:09,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 10:53:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:53:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:09,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:53:09,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:53:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:09,546 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 10:53:09,600 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:53:09,600 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 10:53:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:09,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:09,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273252209] [2022-11-20 10:53:09,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273252209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:09,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:09,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407460415] [2022-11-20 10:53:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:53:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:53:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:09,650 INFO L87 Difference]: Start difference. First operand 303 states and 715 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:11,153 INFO L93 Difference]: Finished difference Result 564 states and 1339 transitions. [2022-11-20 10:53:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:53:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:53:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:11,160 INFO L225 Difference]: With dead ends: 564 [2022-11-20 10:53:11,161 INFO L226 Difference]: Without dead ends: 564 [2022-11-20 10:53:11,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:53:11,162 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 80 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:11,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 7 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 51 Unchecked, 1.4s Time] [2022-11-20 10:53:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-20 10:53:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 433. [2022-11-20 10:53:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 363 states have (on average 3.2479338842975207) internal successors, (1179), 432 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1179 transitions. [2022-11-20 10:53:11,177 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1179 transitions. Word has length 5 [2022-11-20 10:53:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:11,178 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 1179 transitions. [2022-11-20 10:53:11,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1179 transitions. [2022-11-20 10:53:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:53:11,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:11,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:53:11,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:11,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:11,392 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1103743264, now seen corresponding path program 1 times [2022-11-20 10:53:11,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927950269] [2022-11-20 10:53:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:11,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:11,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:11,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:11,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 10:53:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:11,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:53:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:11,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:53:11,614 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:53:11,614 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 10:53:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:11,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:11,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927950269] [2022-11-20 10:53:11,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927950269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:11,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:11,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:11,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264334327] [2022-11-20 10:53:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:11,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:11,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:11,636 INFO L87 Difference]: Start difference. First operand 433 states and 1179 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:12,518 INFO L93 Difference]: Finished difference Result 411 states and 1124 transitions. [2022-11-20 10:53:12,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:12,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:53:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:12,524 INFO L225 Difference]: With dead ends: 411 [2022-11-20 10:53:12,524 INFO L226 Difference]: Without dead ends: 411 [2022-11-20 10:53:12,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:12,525 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:12,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:53:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-20 10:53:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 353. [2022-11-20 10:53:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 292 states have (on average 3.315068493150685) internal successors, (968), 352 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 968 transitions. [2022-11-20 10:53:12,540 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 968 transitions. Word has length 5 [2022-11-20 10:53:12,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:12,540 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 968 transitions. [2022-11-20 10:53:12,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 968 transitions. [2022-11-20 10:53:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:53:12,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:12,541 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 10:53:12,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:12,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:12,754 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 10:53:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -208024362, now seen corresponding path program 2 times [2022-11-20 10:53:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027492290] [2022-11-20 10:53:12,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:53:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:12,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:12,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:12,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 10:53:12,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:53:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:53:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:53:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:13,206 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 10:53:13,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 10:53:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:13,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:14,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:14,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027492290] [2022-11-20 10:53:14,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027492290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:14,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:14,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:53:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508293097] [2022-11-20 10:53:14,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:14,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:53:14,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:53:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:53:14,757 INFO L87 Difference]: Start difference. First operand 353 states and 968 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:21,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:23,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:25,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:27,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:30,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:32,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:34,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:36,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:53:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:45,943 INFO L93 Difference]: Finished difference Result 2006 states and 5027 transitions. [2022-11-20 10:53:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:53:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:53:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:45,959 INFO L225 Difference]: With dead ends: 2006 [2022-11-20 10:53:45,959 INFO L226 Difference]: Without dead ends: 2006 [2022-11-20 10:53:45,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:53:45,960 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 480 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 145 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:45,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 70 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1517 Invalid, 8 Unknown, 0 Unchecked, 29.2s Time] [2022-11-20 10:53:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-11-20 10:53:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 363. [2022-11-20 10:53:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 302 states have (on average 3.2781456953642385) internal successors, (990), 362 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 990 transitions. [2022-11-20 10:53:45,984 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 990 transitions. Word has length 6 [2022-11-20 10:53:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:45,984 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 990 transitions. [2022-11-20 10:53:45,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 990 transitions. [2022-11-20 10:53:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:53:45,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:45,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:53:46,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:46,205 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -143809987, now seen corresponding path program 1 times [2022-11-20 10:53:46,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:46,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010685935] [2022-11-20 10:53:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:46,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 10:53:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:53:46,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:46,652 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-20 10:53:46,653 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 10:53:46,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:46,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 10:53:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:46,801 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 10:53:46,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:46,874 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 10:53:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:47,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:47,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010685935] [2022-11-20 10:53:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010685935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:47,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770518316] [2022-11-20 10:53:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:53:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:53:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:47,026 INFO L87 Difference]: Start difference. First operand 363 states and 990 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:47,802 INFO L93 Difference]: Finished difference Result 344 states and 941 transitions. [2022-11-20 10:53:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:53:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:47,808 INFO L225 Difference]: With dead ends: 344 [2022-11-20 10:53:47,808 INFO L226 Difference]: Without dead ends: 344 [2022-11-20 10:53:47,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:47,809 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:47,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 2 Unchecked, 0.8s Time] [2022-11-20 10:53:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-20 10:53:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-11-20 10:53:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 294 states have (on average 3.2006802721088436) internal successors, (941), 343 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 941 transitions. [2022-11-20 10:53:47,819 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 941 transitions. Word has length 6 [2022-11-20 10:53:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:47,819 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 941 transitions. [2022-11-20 10:53:47,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 941 transitions. [2022-11-20 10:53:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:53:47,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:47,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:53:47,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:48,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:48,035 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -143809986, now seen corresponding path program 1 times [2022-11-20 10:53:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490810997] [2022-11-20 10:53:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:48,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:48,037 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 10:53:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:53:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:48,430 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:53:48,430 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:53:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:53:48,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:53:48,655 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:53:48,656 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 10:53:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:48,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:48,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:48,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490810997] [2022-11-20 10:53:48,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490810997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:48,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:48,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:48,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181423260] [2022-11-20 10:53:48,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:48,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:53:48,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:53:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:48,783 INFO L87 Difference]: Start difference. First operand 344 states and 941 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:49,556 INFO L93 Difference]: Finished difference Result 348 states and 953 transitions. [2022-11-20 10:53:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:53:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:53:49,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:49,561 INFO L225 Difference]: With dead ends: 348 [2022-11-20 10:53:49,562 INFO L226 Difference]: Without dead ends: 348 [2022-11-20 10:53:49,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:53:49,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:49,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-11-20 10:53:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-20 10:53:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-11-20 10:53:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 298 states have (on average 3.197986577181208) internal successors, (953), 347 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 953 transitions. [2022-11-20 10:53:49,573 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 953 transitions. Word has length 6 [2022-11-20 10:53:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:49,574 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 953 transitions. [2022-11-20 10:53:49,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 953 transitions. [2022-11-20 10:53:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:53:49,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:49,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:53:49,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:49,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:49,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -143696490, now seen corresponding path program 1 times [2022-11-20 10:53:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:49,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18696579] [2022-11-20 10:53:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:49,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:49,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:49,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 10:53:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:53:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:52,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:53,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18696579] [2022-11-20 10:53:53,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18696579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:53,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:53,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:53:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988340139] [2022-11-20 10:53:53,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:53,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:53:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:53:53,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:53:53,338 INFO L87 Difference]: Start difference. First operand 348 states and 953 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:56,790 INFO L93 Difference]: Finished difference Result 605 states and 1568 transitions. [2022-11-20 10:53:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:53:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:53:56,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:56,798 INFO L225 Difference]: With dead ends: 605 [2022-11-20 10:53:56,798 INFO L226 Difference]: Without dead ends: 605 [2022-11-20 10:53:56,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:53:56,799 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 225 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:56,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 12 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 50 Unchecked, 2.8s Time] [2022-11-20 10:53:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-20 10:53:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 360. [2022-11-20 10:53:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 310 states have (on average 3.1548387096774193) internal successors, (978), 359 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 978 transitions. [2022-11-20 10:53:56,811 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 978 transitions. Word has length 6 [2022-11-20 10:53:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:56,811 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 978 transitions. [2022-11-20 10:53:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 978 transitions. [2022-11-20 10:53:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:53:56,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:56,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:56,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:57,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:53:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2089453397, now seen corresponding path program 1 times [2022-11-20 10:53:57,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:53:57,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136425957] [2022-11-20 10:53:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:53:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:53:57,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:53:57,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 10:53:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:53:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:57,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:53:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:53:57,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:53:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136425957] [2022-11-20 10:53:57,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136425957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:53:57,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:53:57,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 10:53:57,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100460504] [2022-11-20 10:53:57,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:53:57,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:53:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:53:57,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:53:57,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:53:57,686 INFO L87 Difference]: Start difference. First operand 360 states and 978 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:01,878 INFO L93 Difference]: Finished difference Result 1160 states and 3028 transitions. [2022-11-20 10:54:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:54:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 7 [2022-11-20 10:54:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:01,887 INFO L225 Difference]: With dead ends: 1160 [2022-11-20 10:54:01,887 INFO L226 Difference]: Without dead ends: 1160 [2022-11-20 10:54:01,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:01,888 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:01,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 30 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 10:54:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-11-20 10:54:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 361. [2022-11-20 10:54:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 311 states have (on average 3.147909967845659) internal successors, (979), 360 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 979 transitions. [2022-11-20 10:54:01,904 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 979 transitions. Word has length 7 [2022-11-20 10:54:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:01,904 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 979 transitions. [2022-11-20 10:54:01,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 979 transitions. [2022-11-20 10:54:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:54:01,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:01,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:01,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:02,119 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash -163151747, now seen corresponding path program 1 times [2022-11-20 10:54:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:02,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654083517] [2022-11-20 10:54:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:02,121 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:02,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 10:54:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:54:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:02,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:02,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:02,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654083517] [2022-11-20 10:54:02,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654083517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:02,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:02,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19906156] [2022-11-20 10:54:02,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:02,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:54:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:54:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:02,473 INFO L87 Difference]: Start difference. First operand 361 states and 979 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:05,159 INFO L93 Difference]: Finished difference Result 591 states and 1456 transitions. [2022-11-20 10:54:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:54:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:54:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:05,164 INFO L225 Difference]: With dead ends: 591 [2022-11-20 10:54:05,164 INFO L226 Difference]: Without dead ends: 591 [2022-11-20 10:54:05,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:54:05,165 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 145 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:05,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 18 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 10:54:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-20 10:54:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 440. [2022-11-20 10:54:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 390 states have (on average 3.0743589743589745) internal successors, (1199), 439 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1199 transitions. [2022-11-20 10:54:05,178 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1199 transitions. Word has length 7 [2022-11-20 10:54:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:05,178 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1199 transitions. [2022-11-20 10:54:05,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1199 transitions. [2022-11-20 10:54:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:54:05,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:05,179 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-20 10:54:05,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:05,393 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 10:54:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:05,393 INFO L85 PathProgramCache]: Analyzing trace with hash -159564517, now seen corresponding path program 1 times [2022-11-20 10:54:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:05,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939862994] [2022-11-20 10:54:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:05,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:05,396 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:05,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 10:54:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:54:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:05,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:54:05,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 10:54:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:05,799 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 10:54:05,840 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:54:05,841 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 10:54:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:06,059 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 10:54:06,089 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:54:06,090 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 10:54:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:06,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:08,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:54:08,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2022-11-20 10:54:10,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:54:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:54:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:10,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:10,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939862994] [2022-11-20 10:54:10,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939862994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:10,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:10,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:54:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456404537] [2022-11-20 10:54:10,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:54:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:54:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:54:10,343 INFO L87 Difference]: Start difference. First operand 440 states and 1199 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:13,456 INFO L93 Difference]: Finished difference Result 1339 states and 3298 transitions. [2022-11-20 10:54:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:54:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:54:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:13,464 INFO L225 Difference]: With dead ends: 1339 [2022-11-20 10:54:13,464 INFO L226 Difference]: Without dead ends: 1339 [2022-11-20 10:54:13,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:13,465 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 387 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:13,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 32 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 341 Invalid, 0 Unknown, 344 Unchecked, 2.8s Time] [2022-11-20 10:54:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-11-20 10:54:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 471. [2022-11-20 10:54:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 421 states have (on average 3.007125890736342) internal successors, (1266), 470 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1266 transitions. [2022-11-20 10:54:13,484 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1266 transitions. Word has length 7 [2022-11-20 10:54:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:13,485 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 1266 transitions. [2022-11-20 10:54:13,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1266 transitions. [2022-11-20 10:54:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:54:13,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:13,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:13,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:13,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:13,705 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:13,705 INFO L85 PathProgramCache]: Analyzing trace with hash -401894194, now seen corresponding path program 1 times [2022-11-20 10:54:13,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:13,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191658559] [2022-11-20 10:54:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:13,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:13,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:13,707 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:13,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 10:54:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:54:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:16,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191658559] [2022-11-20 10:54:16,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191658559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:16,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:16,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 10:54:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842281766] [2022-11-20 10:54:16,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:16,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:16,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:16,105 INFO L87 Difference]: Start difference. First operand 471 states and 1266 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:17,748 INFO L93 Difference]: Finished difference Result 487 states and 1296 transitions. [2022-11-20 10:54:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:54:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:54:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:17,754 INFO L225 Difference]: With dead ends: 487 [2022-11-20 10:54:17,754 INFO L226 Difference]: Without dead ends: 487 [2022-11-20 10:54:17,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:17,755 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:17,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 151 Invalid, 0 Unknown, 63 Unchecked, 1.4s Time] [2022-11-20 10:54:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-20 10:54:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 479. [2022-11-20 10:54:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 429 states have (on average 2.986013986013986) internal successors, (1281), 478 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1281 transitions. [2022-11-20 10:54:17,765 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1281 transitions. Word has length 8 [2022-11-20 10:54:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:17,765 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 1281 transitions. [2022-11-20 10:54:17,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1281 transitions. [2022-11-20 10:54:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:54:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:17,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:17,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:54:17,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:17,967 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash -762731770, now seen corresponding path program 1 times [2022-11-20 10:54:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:17,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211053987] [2022-11-20 10:54:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:17,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:17,969 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:17,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 10:54:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:54:18,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:18,276 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:54:18,276 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:54:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:18,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:54:18,501 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:54:18,501 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 10:54:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:18,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:18,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211053987] [2022-11-20 10:54:18,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211053987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:18,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:18,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:18,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372249463] [2022-11-20 10:54:18,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:18,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:18,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:18,644 INFO L87 Difference]: Start difference. First operand 479 states and 1281 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:19,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:19,532 INFO L93 Difference]: Finished difference Result 480 states and 1282 transitions. [2022-11-20 10:54:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:54:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:54:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:19,539 INFO L225 Difference]: With dead ends: 480 [2022-11-20 10:54:19,539 INFO L226 Difference]: Without dead ends: 480 [2022-11-20 10:54:19,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:19,540 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:19,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 45 Unchecked, 0.8s Time] [2022-11-20 10:54:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-20 10:54:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-11-20 10:54:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 430 states have (on average 2.9813953488372094) internal successors, (1282), 479 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1282 transitions. [2022-11-20 10:54:19,550 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1282 transitions. Word has length 8 [2022-11-20 10:54:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:19,551 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 1282 transitions. [2022-11-20 10:54:19,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1282 transitions. [2022-11-20 10:54:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:54:19,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:19,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:19,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:19,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:19,766 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash -651645502, now seen corresponding path program 1 times [2022-11-20 10:54:19,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:19,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136105664] [2022-11-20 10:54:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:19,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:19,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:19,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 10:54:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:54:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:20,239 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:54:20,239 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:54:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:20,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:54:20,465 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:54:20,466 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 24 [2022-11-20 10:54:20,606 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:54:20,606 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 18 treesize of output 28 [2022-11-20 10:54:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:20,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:20,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136105664] [2022-11-20 10:54:20,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136105664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:20,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:20,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:54:20,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809783893] [2022-11-20 10:54:20,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:20,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:54:20,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:54:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:54:20,866 INFO L87 Difference]: Start difference. First operand 480 states and 1282 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:21,790 INFO L93 Difference]: Finished difference Result 492 states and 1305 transitions. [2022-11-20 10:54:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:54:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:54:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:21,795 INFO L225 Difference]: With dead ends: 492 [2022-11-20 10:54:21,796 INFO L226 Difference]: Without dead ends: 492 [2022-11-20 10:54:21,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:54:21,796 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:21,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-11-20 10:54:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-20 10:54:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 492. [2022-11-20 10:54:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 442 states have (on average 2.9524886877828056) internal successors, (1305), 491 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1305 transitions. [2022-11-20 10:54:21,829 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1305 transitions. Word has length 8 [2022-11-20 10:54:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:21,829 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1305 transitions. [2022-11-20 10:54:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1305 transitions. [2022-11-20 10:54:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:54:21,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:21,830 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:21,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:22,044 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash -651532006, now seen corresponding path program 1 times [2022-11-20 10:54:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417270638] [2022-11-20 10:54:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:22,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:22,046 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 10:54:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:54:22,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:22,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:22,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417270638] [2022-11-20 10:54:22,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417270638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:22,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:22,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:54:22,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991455444] [2022-11-20 10:54:22,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:22,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:54:22,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:22,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:54:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:54:22,751 INFO L87 Difference]: Start difference. First operand 492 states and 1305 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 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 10:54:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:26,046 INFO L93 Difference]: Finished difference Result 869 states and 2363 transitions. [2022-11-20 10:54:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:54:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:54:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:26,053 INFO L225 Difference]: With dead ends: 869 [2022-11-20 10:54:26,053 INFO L226 Difference]: Without dead ends: 865 [2022-11-20 10:54:26,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:26,054 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 206 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:26,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 14 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 10:54:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-20 10:54:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 580. [2022-11-20 10:54:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 530 states have (on average 3.1320754716981134) internal successors, (1660), 579 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1660 transitions. [2022-11-20 10:54:26,069 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1660 transitions. Word has length 8 [2022-11-20 10:54:26,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:26,069 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 1660 transitions. [2022-11-20 10:54:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 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 10:54:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1660 transitions. [2022-11-20 10:54:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:54:26,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:26,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:26,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:54:26,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:26,284 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1222685163, now seen corresponding path program 1 times [2022-11-20 10:54:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:26,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053933807] [2022-11-20 10:54:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:26,285 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 10:54:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:26,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 10:54:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:54:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:30,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:30,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053933807] [2022-11-20 10:54:30,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053933807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:30,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:30,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-20 10:54:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047560908] [2022-11-20 10:54:30,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:30,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:54:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:54:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:30,666 INFO L87 Difference]: Start difference. First operand 580 states and 1660 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 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 10:54:52,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:52,073 INFO L93 Difference]: Finished difference Result 1257 states and 3114 transitions. [2022-11-20 10:54:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:54:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 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 9 [2022-11-20 10:54:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:52,087 INFO L225 Difference]: With dead ends: 1257 [2022-11-20 10:54:52,087 INFO L226 Difference]: Without dead ends: 1257 [2022-11-20 10:54:52,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 10:54:52,088 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 488 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:52,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 24 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-20 10:54:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-20 10:54:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 593. [2022-11-20 10:54:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 543 states have (on average 3.103130755064457) internal successors, (1685), 592 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1685 transitions. [2022-11-20 10:54:52,107 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1685 transitions. Word has length 9 [2022-11-20 10:54:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:52,108 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 1685 transitions. [2022-11-20 10:54:52,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 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 10:54:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1685 transitions. [2022-11-20 10:54:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:54:52,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:52,109 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:52,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:54:52,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:52,323 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1166069614, now seen corresponding path program 2 times [2022-11-20 10:54:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:52,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870622956] [2022-11-20 10:54:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:52,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:52,325 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:52,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 10:54:52,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:54:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:52,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:54:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:52,661 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:54:52,662 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:54:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:54:52,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:54:52,987 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 10:54:52,987 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 10:54:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:54:53,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:53,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870622956] [2022-11-20 10:54:53,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870622956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:53,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:53,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:53,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281818100] [2022-11-20 10:54:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:53,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:54:53,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:54:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:54:53,090 INFO L87 Difference]: Start difference. First operand 593 states and 1685 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:53,840 INFO L93 Difference]: Finished difference Result 596 states and 1695 transitions. [2022-11-20 10:54:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:54:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:54:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:53,847 INFO L225 Difference]: With dead ends: 596 [2022-11-20 10:54:53,848 INFO L226 Difference]: Without dead ends: 596 [2022-11-20 10:54:53,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:54:53,849 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:53,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-11-20 10:54:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-20 10:54:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-11-20 10:54:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 546 states have (on average 3.1043956043956045) internal successors, (1695), 595 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1695 transitions. [2022-11-20 10:54:53,863 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1695 transitions. Word has length 10 [2022-11-20 10:54:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:53,863 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 1695 transitions. [2022-11-20 10:54:53,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1695 transitions. [2022-11-20 10:54:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:54:53,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:53,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:54,078 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:54:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 437533778, now seen corresponding path program 1 times [2022-11-20 10:54:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:54:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370825589] [2022-11-20 10:54:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:54,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:54:54,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:54:54,080 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:54:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 10:54:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:54:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:57,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:54:58,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:54:58,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370825589] [2022-11-20 10:54:58,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370825589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:58,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:54:58,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-20 10:54:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455502767] [2022-11-20 10:54:58,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:58,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:54:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:54:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:54:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:54:58,877 INFO L87 Difference]: Start difference. First operand 596 states and 1695 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:16,342 INFO L93 Difference]: Finished difference Result 1467 states and 3959 transitions. [2022-11-20 10:55:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:55:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:55:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:16,355 INFO L225 Difference]: With dead ends: 1467 [2022-11-20 10:55:16,355 INFO L226 Difference]: Without dead ends: 1467 [2022-11-20 10:55:16,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:55:16,357 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 256 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:16,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 40 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-20 10:55:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-11-20 10:55:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 626. [2022-11-20 10:55:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 576 states have (on average 3.0503472222222223) internal successors, (1757), 625 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1757 transitions. [2022-11-20 10:55:16,378 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1757 transitions. Word has length 10 [2022-11-20 10:55:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:16,378 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1757 transitions. [2022-11-20 10:55:16,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1757 transitions. [2022-11-20 10:55:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:55:16,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:16,380 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-20 10:55:16,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-20 10:55:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:16,595 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:55:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1269483382, now seen corresponding path program 1 times [2022-11-20 10:55:16,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:16,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003441533] [2022-11-20 10:55:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:16,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:16,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:55:16,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 10:55:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:55:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:17,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:55:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:55:17,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:19,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003441533] [2022-11-20 10:55:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003441533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:19,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2022-11-20 10:55:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503163790] [2022-11-20 10:55:19,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:55:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:55:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:55:19,824 INFO L87 Difference]: Start difference. First operand 626 states and 1757 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:21,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:55:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:28,418 INFO L93 Difference]: Finished difference Result 736 states and 1988 transitions. [2022-11-20 10:55:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:55:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:55:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:28,428 INFO L225 Difference]: With dead ends: 736 [2022-11-20 10:55:28,428 INFO L226 Difference]: Without dead ends: 736 [2022-11-20 10:55:28,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:55:28,429 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:28,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 28 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 490 Invalid, 1 Unknown, 56 Unchecked, 7.7s Time] [2022-11-20 10:55:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-20 10:55:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 623. [2022-11-20 10:55:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 573 states have (on average 3.0523560209424083) internal successors, (1749), 622 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1749 transitions. [2022-11-20 10:55:28,445 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1749 transitions. Word has length 10 [2022-11-20 10:55:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:28,445 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 1749 transitions. [2022-11-20 10:55:28,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1749 transitions. [2022-11-20 10:55:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:55:28,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:28,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:28,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:55:28,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:28,651 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:55:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1756246536, now seen corresponding path program 1 times [2022-11-20 10:55:28,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:28,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387189971] [2022-11-20 10:55:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:28,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:28,653 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:55:28,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 10:55:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:30,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:30,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387189971] [2022-11-20 10:55:30,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387189971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:30,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:30,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:55:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417461258] [2022-11-20 10:55:30,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:55:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:55:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:55:30,598 INFO L87 Difference]: Start difference. First operand 623 states and 1749 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:36,111 INFO L93 Difference]: Finished difference Result 907 states and 2438 transitions. [2022-11-20 10:55:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:55:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:55:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:36,122 INFO L225 Difference]: With dead ends: 907 [2022-11-20 10:55:36,122 INFO L226 Difference]: Without dead ends: 903 [2022-11-20 10:55:36,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:55:36,123 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:36,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 13 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-20 10:55:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-20 10:55:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 646. [2022-11-20 10:55:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 596 states have (on average 3.01006711409396) internal successors, (1794), 645 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1794 transitions. [2022-11-20 10:55:36,143 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1794 transitions. Word has length 10 [2022-11-20 10:55:36,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:36,144 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1794 transitions. [2022-11-20 10:55:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1794 transitions. [2022-11-20 10:55:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:55:36,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:36,145 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-11-20 10:55:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:36,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:36,360 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:55:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -802492870, now seen corresponding path program 2 times [2022-11-20 10:55:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:36,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002214119] [2022-11-20 10:55:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:55:36,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:36,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:36,362 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:55:36,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 10:55:36,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:55:36,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:55:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:55:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:36,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:55:36,974 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 10:55:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:37,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:37,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002214119] [2022-11-20 10:55:37,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002214119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:37,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:37,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:55:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881945986] [2022-11-20 10:55:37,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:55:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:55:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:55:37,712 INFO L87 Difference]: Start difference. First operand 646 states and 1794 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:45,648 INFO L93 Difference]: Finished difference Result 1530 states and 3928 transitions. [2022-11-20 10:55:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:55:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:55:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:45,658 INFO L225 Difference]: With dead ends: 1530 [2022-11-20 10:55:45,659 INFO L226 Difference]: Without dead ends: 1530 [2022-11-20 10:55:45,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:55:45,659 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 313 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:45,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 52 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-20 10:55:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-20 10:55:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 637. [2022-11-20 10:55:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 587 states have (on average 3.0051107325383306) internal successors, (1764), 636 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1764 transitions. [2022-11-20 10:55:45,683 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1764 transitions. Word has length 10 [2022-11-20 10:55:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:45,683 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1764 transitions. [2022-11-20 10:55:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1764 transitions. [2022-11-20 10:55:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:55:45,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:45,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:45,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:45,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:45,900 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:55:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash 833609098, now seen corresponding path program 1 times [2022-11-20 10:55:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:45,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176949575] [2022-11-20 10:55:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:45,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:45,902 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:55:45,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 10:55:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:55:46,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:46,355 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:55:46,356 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:55:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:55:46,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:55:46,585 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:55:46,586 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 24 [2022-11-20 10:55:46,735 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:55:46,736 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 18 treesize of output 28 [2022-11-20 10:55:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:47,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:47,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176949575] [2022-11-20 10:55:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176949575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:47,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:47,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552180871] [2022-11-20 10:55:47,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:47,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:55:47,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:55:47,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:55:47,055 INFO L87 Difference]: Start difference. First operand 637 states and 1764 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:47,980 INFO L93 Difference]: Finished difference Result 639 states and 1765 transitions. [2022-11-20 10:55:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:55:47,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:55:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:47,987 INFO L225 Difference]: With dead ends: 639 [2022-11-20 10:55:47,987 INFO L226 Difference]: Without dead ends: 639 [2022-11-20 10:55:47,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:55:47,988 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:47,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-11-20 10:55:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-20 10:55:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 638. [2022-11-20 10:55:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 588 states have (on average 3.001700680272109) internal successors, (1765), 637 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1765 transitions. [2022-11-20 10:55:48,003 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1765 transitions. Word has length 10 [2022-11-20 10:55:48,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:48,004 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 1765 transitions. [2022-11-20 10:55:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1765 transitions. [2022-11-20 10:55:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:55:48,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:48,005 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:48,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:48,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:48,211 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:55:48,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1788410189, now seen corresponding path program 1 times [2022-11-20 10:55:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:55:48,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442098434] [2022-11-20 10:55:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:55:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:55:48,212 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:55:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 10:55:48,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:55:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:48,648 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 10:55:48,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 10:55:48,820 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 10:55:49,195 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 10:55:49,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:50,024 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 10:55:50,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:55:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442098434] [2022-11-20 10:55:50,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442098434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:50,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 10:55:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528849462] [2022-11-20 10:55:50,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:55:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:55:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:55:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:55:50,027 INFO L87 Difference]: Start difference. First operand 638 states and 1765 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:52,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:55:58,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:00,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:05,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:05,947 INFO L93 Difference]: Finished difference Result 1385 states and 3566 transitions. [2022-11-20 10:56:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:56:05,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:56:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:05,955 INFO L225 Difference]: With dead ends: 1385 [2022-11-20 10:56:05,955 INFO L226 Difference]: Without dead ends: 1385 [2022-11-20 10:56:05,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:56:05,956 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 93 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:05,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 71 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1065 Invalid, 1 Unknown, 0 Unchecked, 14.2s Time] [2022-11-20 10:56:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-20 10:56:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 640. [2022-11-20 10:56:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 590 states have (on average 2.9915254237288136) internal successors, (1765), 639 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1765 transitions. [2022-11-20 10:56:05,976 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1765 transitions. Word has length 11 [2022-11-20 10:56:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:05,976 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 1765 transitions. [2022-11-20 10:56:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1765 transitions. [2022-11-20 10:56:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:56:05,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:05,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:05,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-20 10:56:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:06,198 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:56:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash 627504475, now seen corresponding path program 1 times [2022-11-20 10:56:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:06,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572261231] [2022-11-20 10:56:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:06,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:06,201 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:56:06,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 10:56:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:56:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:06,772 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-20 10:56:06,772 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 10:56:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:56:06,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 10:56:07,112 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:56:07,112 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 24 [2022-11-20 10:56:07,287 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 10:56:07,287 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 18 treesize of output 28 [2022-11-20 10:56:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:56:07,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:56:07,575 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:07,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572261231] [2022-11-20 10:56:07,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572261231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:07,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:07,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:56:07,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070303486] [2022-11-20 10:56:07,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:07,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:56:07,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:07,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:56:07,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:56:07,576 INFO L87 Difference]: Start difference. First operand 640 states and 1765 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 10:56:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:08,476 INFO L93 Difference]: Finished difference Result 640 states and 1774 transitions. [2022-11-20 10:56:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:56:08,480 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 11 [2022-11-20 10:56:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:08,482 INFO L225 Difference]: With dead ends: 640 [2022-11-20 10:56:08,482 INFO L226 Difference]: Without dead ends: 640 [2022-11-20 10:56:08,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:08,483 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:08,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-11-20 10:56:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-20 10:56:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 637. [2022-11-20 10:56:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 587 states have (on average 3.0051107325383306) internal successors, (1764), 636 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1764 transitions. [2022-11-20 10:56:08,496 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1764 transitions. Word has length 11 [2022-11-20 10:56:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:08,497 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1764 transitions. [2022-11-20 10:56:08,497 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 10:56:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1764 transitions. [2022-11-20 10:56:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:56:08,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:08,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:08,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:56:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:08,707 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:56:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 627617971, now seen corresponding path program 1 times [2022-11-20 10:56:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:08,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086045023] [2022-11-20 10:56:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:08,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:08,709 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:56:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 10:56:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:56:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:56:13,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:56:16,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086045023] [2022-11-20 10:56:16,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086045023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:16,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:16,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:56:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362843061] [2022-11-20 10:56:16,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:16,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:56:16,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:56:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:56:16,115 INFO L87 Difference]: Start difference. First operand 637 states and 1764 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:35,246 INFO L93 Difference]: Finished difference Result 656 states and 1800 transitions. [2022-11-20 10:56:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:56:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:56:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:35,255 INFO L225 Difference]: With dead ends: 656 [2022-11-20 10:56:35,255 INFO L226 Difference]: Without dead ends: 656 [2022-11-20 10:56:35,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2022-11-20 10:56:35,255 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 120 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:35,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 18 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 432 Invalid, 0 Unknown, 50 Unchecked, 6.3s Time] [2022-11-20 10:56:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-11-20 10:56:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 631. [2022-11-20 10:56:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 581 states have (on average 3.0154905335628226) internal successors, (1752), 630 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1752 transitions. [2022-11-20 10:56:35,265 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1752 transitions. Word has length 11 [2022-11-20 10:56:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:35,265 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1752 transitions. [2022-11-20 10:56:35,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1752 transitions. [2022-11-20 10:56:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:56:35,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:35,266 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2022-11-20 10:56:35,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:56:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:35,466 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:56:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 836160717, now seen corresponding path program 1 times [2022-11-20 10:56:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:56:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507531876] [2022-11-20 10:56:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:35,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:56:35,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:56:35,468 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:56:35,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 10:56:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:56:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:56:35,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:56:36,551 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 10:56:36,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:56:39,414 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 10:56:39,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:56:39,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507531876] [2022-11-20 10:56:39,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507531876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:56:39,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:56:39,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:56:39,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226451276] [2022-11-20 10:56:39,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:56:39,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:56:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:56:39,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:56:39,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:56:39,416 INFO L87 Difference]: Start difference. First operand 631 states and 1752 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:56:46,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:48,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:50,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:52,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:54,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:56:56,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:01,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:03,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:05,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:07,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:09,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:11,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 10:57:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:37,638 INFO L93 Difference]: Finished difference Result 5604 states and 15479 transitions. [2022-11-20 10:57:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:57:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:57:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:37,662 INFO L225 Difference]: With dead ends: 5604 [2022-11-20 10:57:37,662 INFO L226 Difference]: Without dead ends: 5604 [2022-11-20 10:57:37,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:57:37,663 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1459 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2641 mSolverCounterSat, 219 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2641 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:37,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 136 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2641 Invalid, 11 Unknown, 0 Unchecked, 51.3s Time] [2022-11-20 10:57:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2022-11-20 10:57:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 664. [2022-11-20 10:57:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 614 states have (on average 2.990228013029316) internal successors, (1836), 663 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1836 transitions. [2022-11-20 10:57:37,736 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1836 transitions. Word has length 11 [2022-11-20 10:57:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:37,738 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1836 transitions. [2022-11-20 10:57:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:57:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1836 transitions. [2022-11-20 10:57:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:57:37,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:37,741 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-20 10:57:37,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:37,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:57:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash 892525531, now seen corresponding path program 3 times [2022-11-20 10:57:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:57:37,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075072162] [2022-11-20 10:57:37,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:57:37,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:57:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:57:37,963 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:57:37,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 10:57:38,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:57:38,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:38,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 10:57:38,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:40,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:57:41,539 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 10:57:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:57:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:57:44,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:57:44,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075072162] [2022-11-20 10:57:44,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075072162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:44,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:44,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:57:44,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918125736] [2022-11-20 10:57:44,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:44,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:57:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:57:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:57:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:57:44,088 INFO L87 Difference]: Start difference. First operand 664 states and 1836 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:13,629 INFO L93 Difference]: Finished difference Result 1712 states and 4428 transitions. [2022-11-20 10:58:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:58:13,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:58:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:13,640 INFO L225 Difference]: With dead ends: 1712 [2022-11-20 10:58:13,640 INFO L226 Difference]: Without dead ends: 1712 [2022-11-20 10:58:13,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 10:58:13,641 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 364 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:13,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 54 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 934 Invalid, 0 Unknown, 205 Unchecked, 15.8s Time] [2022-11-20 10:58:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-20 10:58:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 725. [2022-11-20 10:58:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 675 states have (on average 2.925925925925926) internal successors, (1975), 724 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1975 transitions. [2022-11-20 10:58:13,674 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1975 transitions. Word has length 11 [2022-11-20 10:58:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:13,675 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1975 transitions. [2022-11-20 10:58:13,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1975 transitions. [2022-11-20 10:58:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:58:13,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:13,676 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2022-11-20 10:58:13,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 10:58:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:13,890 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:58:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash -775636973, now seen corresponding path program 2 times [2022-11-20 10:58:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:58:13,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574641053] [2022-11-20 10:58:13,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:13,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:58:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:58:13,892 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:58:13,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 10:58:14,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 10:58:14,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:14,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:58:14,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 10:58:14,472 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:58:14,472 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 10:58:14,500 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 10:58:14,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:58:14,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:58:14,711 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:58:14,711 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 10:58:14,937 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:58:14,938 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 10:58:14,983 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 10:58:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:58:15,296 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 21 treesize of output 21 [2022-11-20 10:58:15,345 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 10:58:15,345 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 10:58:15,419 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 10:58:15,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:16,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:58:16,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2022-11-20 10:58:19,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:58:19,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 108 [2022-11-20 10:58:24,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:58:24,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 123 [2022-11-20 10:58:28,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:58:28,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:58:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:58:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:58:28,782 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 10:58:28,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:58:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574641053] [2022-11-20 10:58:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574641053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:28,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:58:28,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 10:58:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121044206] [2022-11-20 10:58:28,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:58:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:58:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:58:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=258, Unknown=3, NotChecked=0, Total=342 [2022-11-20 10:58:28,784 INFO L87 Difference]: Start difference. First operand 725 states and 1975 transitions. Second operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:43,549 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:58:58,558 WARN L233 SmtUtils]: Spent 10.27s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:59:09,915 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:59:27,869 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:59:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:28,764 INFO L93 Difference]: Finished difference Result 2398 states and 6535 transitions. [2022-11-20 10:59:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:59:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:59:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:28,778 INFO L225 Difference]: With dead ends: 2398 [2022-11-20 10:59:28,778 INFO L226 Difference]: Without dead ends: 2398 [2022-11-20 10:59:28,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=213, Invalid=706, Unknown=11, NotChecked=0, Total=930 [2022-11-20 10:59:28,783 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 574 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1329 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:28,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 125 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 576 Invalid, 0 Unknown, 1329 Unchecked, 4.0s Time] [2022-11-20 10:59:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2022-11-20 10:59:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 749. [2022-11-20 10:59:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 699 states have (on average 2.8941344778254647) internal successors, (2023), 748 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2023 transitions. [2022-11-20 10:59:28,818 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2023 transitions. Word has length 11 [2022-11-20 10:59:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:28,818 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2023 transitions. [2022-11-20 10:59:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2023 transitions. [2022-11-20 10:59:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:59:28,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:28,820 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 10:59:28,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:29,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:29,034 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 10:59:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1495040842, now seen corresponding path program 3 times [2022-11-20 10:59:29,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:59:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070131124] [2022-11-20 10:59:29,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:29,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:59:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:59:29,037 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:59:29,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 10:59:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:59:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:59:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:29,939 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 10:59:29,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10:59:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:36,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:59:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070131124] [2022-11-20 10:59:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070131124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:36,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:36,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 10:59:36,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342995844] [2022-11-20 10:59:36,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:36,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:59:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:59:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:59:36,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:59:36,464 INFO L87 Difference]: Start difference. First operand 749 states and 2023 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 11:00:08,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:10,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:12,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:14,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:16,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:18,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:20,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:22,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:24,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:26,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:29,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:31,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:33,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:35,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:37,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:39,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:41,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:43,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:45,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:00:47,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:15,338 INFO L93 Difference]: Finished difference Result 5341 states and 14654 transitions. [2022-11-20 11:01:15,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:01:15,344 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 11:01:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:15,359 INFO L225 Difference]: With dead ends: 5341 [2022-11-20 11:01:15,359 INFO L226 Difference]: Without dead ends: 5341 [2022-11-20 11:01:15,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:01:15,360 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1046 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5752 mSolverCounterSat, 357 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 5752 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 286 Invalid, 6129 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [357 Valid, 5752 Invalid, 20 Unknown, 0 Unchecked, 79.6s Time] [2022-11-20 11:01:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5341 states. [2022-11-20 11:01:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5341 to 769. [2022-11-20 11:01:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 719 states have (on average 2.8692628650904033) internal successors, (2063), 768 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2063 transitions. [2022-11-20 11:01:15,413 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2063 transitions. Word has length 12 [2022-11-20 11:01:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:15,413 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 2063 transitions. [2022-11-20 11:01:15,414 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 11:01:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2063 transitions. [2022-11-20 11:01:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:15,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:15,415 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:15,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:15,634 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:15,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1938303160, now seen corresponding path program 2 times [2022-11-20 11:01:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:15,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776806959] [2022-11-20 11:01:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:01:15,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:15,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:15,636 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:15,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:15,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:01:15,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:01:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:01:17,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:17,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:01:17,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776806959] [2022-11-20 11:01:17,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776806959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:17,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:17,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:01:17,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670434712] [2022-11-20 11:01:17,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:01:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:01:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:01:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:17,400 INFO L87 Difference]: Start difference. First operand 769 states and 2063 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:17,936 INFO L93 Difference]: Finished difference Result 772 states and 2072 transitions. [2022-11-20 11:01:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:01:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:01:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:17,943 INFO L225 Difference]: With dead ends: 772 [2022-11-20 11:01:17,943 INFO L226 Difference]: Without dead ends: 772 [2022-11-20 11:01:17,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:17,944 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:17,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-11-20 11:01:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-20 11:01:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-11-20 11:01:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 722 states have (on average 2.8698060941828256) internal successors, (2072), 771 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2072 transitions. [2022-11-20 11:01:17,976 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2072 transitions. Word has length 12 [2022-11-20 11:01:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:17,977 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 2072 transitions. [2022-11-20 11:01:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2072 transitions. [2022-11-20 11:01:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:17,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:17,978 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:17,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:18,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:18,192 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:18,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1938303096, now seen corresponding path program 1 times [2022-11-20 11:01:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969042978] [2022-11-20 11:01:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:18,194 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:18,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:01:18,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:18,677 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:01:18,678 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 11:01:18,961 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 20 treesize of output 14 [2022-11-20 11:01:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:19,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:20,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:01:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969042978] [2022-11-20 11:01:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969042978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:20,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:01:20,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:01:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361101523] [2022-11-20 11:01:20,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:01:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:01:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:01:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:01:20,436 INFO L87 Difference]: Start difference. First operand 772 states and 2072 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:23,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:29,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:31,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:34,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:36,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:01:41,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:41,135 INFO L93 Difference]: Finished difference Result 1267 states and 3267 transitions. [2022-11-20 11:01:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:01:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:01:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:41,142 INFO L225 Difference]: With dead ends: 1267 [2022-11-20 11:01:41,142 INFO L226 Difference]: Without dead ends: 1267 [2022-11-20 11:01:41,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:01:41,143 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 327 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 93 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:41,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 48 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 903 Invalid, 5 Unknown, 0 Unchecked, 18.2s Time] [2022-11-20 11:01:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-20 11:01:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 773. [2022-11-20 11:01:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 723 states have (on average 2.867219917012448) internal successors, (2073), 772 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2073 transitions. [2022-11-20 11:01:41,156 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2073 transitions. Word has length 12 [2022-11-20 11:01:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:41,157 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 2073 transitions. [2022-11-20 11:01:41,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2073 transitions. [2022-11-20 11:01:41,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:41,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:41,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:41,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:41,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:41,358 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2022207232, now seen corresponding path program 1 times [2022-11-20 11:01:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:41,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638824104] [2022-11-20 11:01:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:41,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:41,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:41,360 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:41,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:01:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:41,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:01:41,879 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:01:41,879 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 24 [2022-11-20 11:01:41,971 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:01:41,972 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 18 treesize of output 28 [2022-11-20 11:01:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:01:42,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:42,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:01:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638824104] [2022-11-20 11:01:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638824104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:42,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:01:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249866681] [2022-11-20 11:01:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:01:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:01:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:01:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:42,158 INFO L87 Difference]: Start difference. First operand 773 states and 2073 transitions. Second operand has 6 states, 5 states have (on average 2.4) 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 11:01:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:43,137 INFO L93 Difference]: Finished difference Result 727 states and 1900 transitions. [2022-11-20 11:01:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:01:43,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) 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 12 [2022-11-20 11:01:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:43,143 INFO L225 Difference]: With dead ends: 727 [2022-11-20 11:01:43,143 INFO L226 Difference]: Without dead ends: 727 [2022-11-20 11:01:43,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:01:43,144 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:43,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 2 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 2 Unchecked, 0.9s Time] [2022-11-20 11:01:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-11-20 11:01:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 724. [2022-11-20 11:01:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 686 states have (on average 2.7565597667638486) internal successors, (1891), 723 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1891 transitions. [2022-11-20 11:01:43,155 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1891 transitions. Word has length 12 [2022-11-20 11:01:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:43,155 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 1891 transitions. [2022-11-20 11:01:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) 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 11:01:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1891 transitions. [2022-11-20 11:01:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:43,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:43,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:43,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:43,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:43,356 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2022207168, now seen corresponding path program 1 times [2022-11-20 11:01:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:43,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287516190] [2022-11-20 11:01:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:43,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:43,358 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:01:43,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:43,978 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:01:43,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:01:44,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:01:44,063 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 11:01:44,142 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:01:44,142 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 24 [2022-11-20 11:01:44,240 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:01:44,240 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 18 treesize of output 28 [2022-11-20 11:01:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:01:44,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:01:44,396 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:01:44,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287516190] [2022-11-20 11:01:44,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287516190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:01:44,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:01:44,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:01:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764830715] [2022-11-20 11:01:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:01:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:01:44,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:01:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:01:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:01:44,398 INFO L87 Difference]: Start difference. First operand 724 states and 1891 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 11:01:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:45,328 INFO L93 Difference]: Finished difference Result 700 states and 1800 transitions. [2022-11-20 11:01:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:01:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:01:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:45,334 INFO L225 Difference]: With dead ends: 700 [2022-11-20 11:01:45,334 INFO L226 Difference]: Without dead ends: 700 [2022-11-20 11:01:45,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:01:45,334 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:45,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 2 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 2 Unchecked, 0.8s Time] [2022-11-20 11:01:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-20 11:01:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2022-11-20 11:01:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 669 states have (on average 2.690582959641256) internal successors, (1800), 699 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1800 transitions. [2022-11-20 11:01:45,350 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1800 transitions. Word has length 12 [2022-11-20 11:01:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:45,350 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 1800 transitions. [2022-11-20 11:01:45,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 11:01:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1800 transitions. [2022-11-20 11:01:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:45,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:45,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:45,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:45,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:45,552 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2022207231, now seen corresponding path program 1 times [2022-11-20 11:01:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098042014] [2022-11-20 11:01:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:45,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:45,554 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:45,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:01:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:46,744 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 11:01:46,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:01:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:01:47,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:01:47,550 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:01:47,551 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 11:01:48,064 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:01:48,064 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 18 treesize of output 24 [2022-11-20 11:01:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:01:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:52,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:01:52,708 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 11:01:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:01:53,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:01:53,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098042014] [2022-11-20 11:01:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098042014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:53,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:01:53,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:01:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461980756] [2022-11-20 11:01:53,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:01:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:01:53,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:01:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:01:53,201 INFO L87 Difference]: Start difference. First operand 700 states and 1800 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:01:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:57,449 INFO L93 Difference]: Finished difference Result 905 states and 2413 transitions. [2022-11-20 11:01:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:01:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:01:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:57,455 INFO L225 Difference]: With dead ends: 905 [2022-11-20 11:01:57,455 INFO L226 Difference]: Without dead ends: 905 [2022-11-20 11:01:57,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:01:57,456 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:57,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 232 Unchecked, 1.2s Time] [2022-11-20 11:01:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-20 11:01:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 720. [2022-11-20 11:01:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 689 states have (on average 2.6734397677793904) internal successors, (1842), 719 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1842 transitions. [2022-11-20 11:01:57,465 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1842 transitions. Word has length 12 [2022-11-20 11:01:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:57,465 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1842 transitions. [2022-11-20 11:01:57,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:01:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1842 transitions. [2022-11-20 11:01:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:01:57,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:57,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:57,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:57,675 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:01:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2022207166, now seen corresponding path program 1 times [2022-11-20 11:01:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:01:57,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394007258] [2022-11-20 11:01:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:57,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:01:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:01:57,677 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:01:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:01:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:01:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:58,308 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:01:58,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 11:01:58,464 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:01:58,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:02:01,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:01,278 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 11:02:01,304 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:02:01,304 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 11:02:01,931 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:02:01,931 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 11:02:03,052 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:02:03,053 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 46 treesize of output 52 [2022-11-20 11:02:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:02:11,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:02:18,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:18,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394007258] [2022-11-20 11:02:18,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394007258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:18,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:02:18,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:02:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139962294] [2022-11-20 11:02:18,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:18,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:02:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:02:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:02:18,662 INFO L87 Difference]: Start difference. First operand 720 states and 1842 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:02:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:21,205 INFO L93 Difference]: Finished difference Result 809 states and 2148 transitions. [2022-11-20 11:02:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:02:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:02:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:21,212 INFO L225 Difference]: With dead ends: 809 [2022-11-20 11:02:21,212 INFO L226 Difference]: Without dead ends: 809 [2022-11-20 11:02:21,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:02:21,213 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:21,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 37 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 280 Unchecked, 2.3s Time] [2022-11-20 11:02:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-20 11:02:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 764. [2022-11-20 11:02:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 733 states have (on average 2.720327421555252) internal successors, (1994), 763 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1994 transitions. [2022-11-20 11:02:21,223 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1994 transitions. Word has length 12 [2022-11-20 11:02:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:21,223 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1994 transitions. [2022-11-20 11:02:21,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:02:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1994 transitions. [2022-11-20 11:02:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:02:21,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:21,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:21,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:21,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:21,425 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:02:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 63331710, now seen corresponding path program 1 times [2022-11-20 11:02:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:02:21,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574793083] [2022-11-20 11:02:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:21,425 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 11:02:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:02:21,426 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:02:21,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:02:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:21,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:02:21,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574793083] [2022-11-20 11:02:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574793083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:02:21,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:02:21,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:02:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799260787] [2022-11-20 11:02:21,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:02:21,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:02:21,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:02:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:02:21,718 INFO L87 Difference]: Start difference. First operand 764 states and 1994 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:22,491 INFO L93 Difference]: Finished difference Result 747 states and 1941 transitions. [2022-11-20 11:02:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:02:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:02:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:22,498 INFO L225 Difference]: With dead ends: 747 [2022-11-20 11:02:22,498 INFO L226 Difference]: Without dead ends: 719 [2022-11-20 11:02:22,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 11:02:22,499 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:22,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:02:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-11-20 11:02:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 702. [2022-11-20 11:02:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 679 states have (on average 2.7172312223858617) internal successors, (1845), 701 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1845 transitions. [2022-11-20 11:02:22,511 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1845 transitions. Word has length 12 [2022-11-20 11:02:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:22,511 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 1845 transitions. [2022-11-20 11:02:22,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1845 transitions. [2022-11-20 11:02:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:02:22,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:22,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:22,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:22,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:22,731 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:02:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1758471284, now seen corresponding path program 1 times [2022-11-20 11:02:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:02:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070128416] [2022-11-20 11:02:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:02:22,734 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:02:22,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:02:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:23,343 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 11:02:23,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:02:23,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070128416] [2022-11-20 11:02:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070128416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:02:23,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:02:23,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:02:23,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501068240] [2022-11-20 11:02:23,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:02:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:02:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:23,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:02:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:02:23,345 INFO L87 Difference]: Start difference. First operand 702 states and 1845 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 11:02:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:25,428 INFO L93 Difference]: Finished difference Result 723 states and 1796 transitions. [2022-11-20 11:02:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:02:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:02:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:25,434 INFO L225 Difference]: With dead ends: 723 [2022-11-20 11:02:25,434 INFO L226 Difference]: Without dead ends: 684 [2022-11-20 11:02:25,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:02:25,435 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:25,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 9 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 11:02:25,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-20 11:02:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 658. [2022-11-20 11:02:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 635 states have (on average 2.5937007874015747) internal successors, (1647), 657 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1647 transitions. [2022-11-20 11:02:25,457 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1647 transitions. Word has length 12 [2022-11-20 11:02:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:25,457 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 1647 transitions. [2022-11-20 11:02:25,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 11:02:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1647 transitions. [2022-11-20 11:02:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:02:25,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:25,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:25,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:25,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:25,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:02:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1502299986, now seen corresponding path program 1 times [2022-11-20 11:02:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:02:25,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914496356] [2022-11-20 11:02:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:25,661 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 11:02:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:02:25,661 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:02:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:02:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:26,228 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:02:26,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:02:29,589 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 11:02:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:02:33,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:02:34,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:34,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914496356] [2022-11-20 11:02:34,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914496356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:34,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:02:34,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 11:02:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033308680] [2022-11-20 11:02:34,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:34,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:02:34,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:02:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:02:34,992 INFO L87 Difference]: Start difference. First operand 658 states and 1647 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:41,514 INFO L93 Difference]: Finished difference Result 1012 states and 2563 transitions. [2022-11-20 11:02:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:02:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:02:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:41,520 INFO L225 Difference]: With dead ends: 1012 [2022-11-20 11:02:41,520 INFO L226 Difference]: Without dead ends: 1012 [2022-11-20 11:02:41,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:02:41,521 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 121 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:41,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 27 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 204 Invalid, 0 Unknown, 234 Unchecked, 2.4s Time] [2022-11-20 11:02:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-11-20 11:02:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 672. [2022-11-20 11:02:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 649 states have (on average 2.5762711864406778) internal successors, (1672), 671 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1672 transitions. [2022-11-20 11:02:41,533 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1672 transitions. Word has length 13 [2022-11-20 11:02:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:41,533 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1672 transitions. [2022-11-20 11:02:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1672 transitions. [2022-11-20 11:02:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:02:41,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:41,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 11:02:41,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:41,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:02:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash -777319933, now seen corresponding path program 2 times [2022-11-20 11:02:41,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:02:41,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081042273] [2022-11-20 11:02:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:02:41,735 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 11:02:41,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:02:41,736 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:02:41,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:42,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:02:42,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:02:42,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:42,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:02:42,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 11:02:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:42,551 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 11:02:42,580 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:02:42,580 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 11:02:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:42,823 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 23 treesize of output 23 [2022-11-20 11:02:42,882 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:02:42,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:02:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:02:43,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:45,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:02:45,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 74 [2022-11-20 11:02:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:02:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:02:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:02:48,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081042273] [2022-11-20 11:02:48,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081042273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:48,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:02:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:02:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146189494] [2022-11-20 11:02:48,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:02:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:02:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2022-11-20 11:02:48,807 INFO L87 Difference]: Start difference. First operand 672 states and 1672 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:51,608 INFO L93 Difference]: Finished difference Result 1427 states and 3394 transitions. [2022-11-20 11:02:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:02:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:02:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:51,612 INFO L225 Difference]: With dead ends: 1427 [2022-11-20 11:02:51,612 INFO L226 Difference]: Without dead ends: 1427 [2022-11-20 11:02:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=62, Invalid=147, Unknown=1, NotChecked=0, Total=210 [2022-11-20 11:02:51,613 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 231 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:51,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 27 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 232 Unchecked, 2.2s Time] [2022-11-20 11:02:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-11-20 11:02:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 791. [2022-11-20 11:02:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 768 states have (on average 2.4674479166666665) internal successors, (1895), 790 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:51,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1895 transitions. [2022-11-20 11:02:51,630 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1895 transitions. Word has length 13 [2022-11-20 11:02:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:51,630 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1895 transitions. [2022-11-20 11:02:51,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:51,631 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1895 transitions. [2022-11-20 11:02:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:02:51,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:51,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:51,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:51,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:51,832 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:02:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1736403411, now seen corresponding path program 1 times [2022-11-20 11:02:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:02:51,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022343050] [2022-11-20 11:02:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:51,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:02:51,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:02:51,834 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:02:51,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:02:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:02:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:52,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:02:52,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10 treesize of output 9 [2022-11-20 11:02:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:02:53,653 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 11:02:53,681 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:02:53,681 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 11:02:54,309 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:02:54,309 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 18 treesize of output 24 [2022-11-20 11:02:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:02:56,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:57,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:02:57,909 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 11:02:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:02:58,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:02:58,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022343050] [2022-11-20 11:02:58,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022343050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:58,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:02:58,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:02:58,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305310678] [2022-11-20 11:02:58,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:58,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:02:58,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:02:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:02:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:02:58,427 INFO L87 Difference]: Start difference. First operand 791 states and 1895 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 11:03:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:02,765 INFO L93 Difference]: Finished difference Result 797 states and 1914 transitions. [2022-11-20 11:03:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:03:02,771 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 11:03:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:02,772 INFO L225 Difference]: With dead ends: 797 [2022-11-20 11:03:02,772 INFO L226 Difference]: Without dead ends: 797 [2022-11-20 11:03:02,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:03:02,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:02,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 84 Unchecked, 1.8s Time] [2022-11-20 11:03:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-20 11:03:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 793. [2022-11-20 11:03:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 770 states have (on average 2.4675324675324677) internal successors, (1900), 792 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1900 transitions. [2022-11-20 11:03:02,782 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1900 transitions. Word has length 13 [2022-11-20 11:03:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:02,782 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1900 transitions. [2022-11-20 11:03:02,782 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 11:03:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1900 transitions. [2022-11-20 11:03:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:03:02,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:02,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:02,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:02,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:02,985 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:03:02,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1736091861, now seen corresponding path program 2 times [2022-11-20 11:03:02,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:03:02,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502977605] [2022-11-20 11:03:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:02,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:03:02,988 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:03:02,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:03,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:03:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:04,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:03:04,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:03:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:04,720 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 11:03:04,757 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:03:04,757 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 11:03:05,330 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:03:05,330 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 11:03:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:07,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:11,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:03:11,866 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 11:03:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:12,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:03:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502977605] [2022-11-20 11:03:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502977605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:12,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:03:12,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:03:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720247547] [2022-11-20 11:03:12,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:03:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:03:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:03:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:03:12,514 INFO L87 Difference]: Start difference. First operand 793 states and 1900 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 11:03:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:15,271 INFO L93 Difference]: Finished difference Result 862 states and 2155 transitions. [2022-11-20 11:03:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:03:15,276 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 11:03:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:15,278 INFO L225 Difference]: With dead ends: 862 [2022-11-20 11:03:15,278 INFO L226 Difference]: Without dead ends: 862 [2022-11-20 11:03:15,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:03:15,279 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:15,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 24 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 206 Unchecked, 2.2s Time] [2022-11-20 11:03:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-20 11:03:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 814. [2022-11-20 11:03:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 791 states have (on average 2.52338811630847) internal successors, (1996), 813 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1996 transitions. [2022-11-20 11:03:15,292 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1996 transitions. Word has length 13 [2022-11-20 11:03:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:15,292 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1996 transitions. [2022-11-20 11:03:15,292 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 11:03:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1996 transitions. [2022-11-20 11:03:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:03:15,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:15,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:15,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:15,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:15,512 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:03:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1736091926, now seen corresponding path program 1 times [2022-11-20 11:03:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:03:15,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027523721] [2022-11-20 11:03:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:15,512 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 11:03:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:03:15,513 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:03:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:03:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:16,365 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:03:16,365 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 14 treesize of output 29 [2022-11-20 11:03:16,541 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:03:16,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:03:17,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:17,381 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 11:03:17,412 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:03:17,412 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 11:03:18,181 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:03:18,182 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 11:03:19,413 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:03:19,414 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 46 treesize of output 52 [2022-11-20 11:03:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:27,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:34,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:03:34,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027523721] [2022-11-20 11:03:34,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027523721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:34,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:03:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:03:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378153488] [2022-11-20 11:03:34,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:34,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:03:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:03:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:03:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:03:34,896 INFO L87 Difference]: Start difference. First operand 814 states and 1996 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 11:03:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:36,877 INFO L93 Difference]: Finished difference Result 817 states and 2002 transitions. [2022-11-20 11:03:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:03:36,883 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 11:03:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:36,884 INFO L225 Difference]: With dead ends: 817 [2022-11-20 11:03:36,884 INFO L226 Difference]: Without dead ends: 817 [2022-11-20 11:03:36,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:03:36,885 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:36,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 150 Unchecked, 1.8s Time] [2022-11-20 11:03:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-20 11:03:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 814. [2022-11-20 11:03:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 791 states have (on average 2.52212389380531) internal successors, (1995), 813 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1995 transitions. [2022-11-20 11:03:36,896 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1995 transitions. Word has length 13 [2022-11-20 11:03:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:36,896 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1995 transitions. [2022-11-20 11:03:36,896 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 11:03:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1995 transitions. [2022-11-20 11:03:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:03:36,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:36,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:36,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:37,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:37,098 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:03:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2006030626, now seen corresponding path program 1 times [2022-11-20 11:03:37,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:03:37,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211230712] [2022-11-20 11:03:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:03:37,099 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:03:37,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:03:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:38,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 10 treesize of output 9 [2022-11-20 11:03:38,375 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:03:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:38,900 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 11:03:38,928 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:03:38,929 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 11:03:39,605 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:03:39,606 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 18 treesize of output 24 [2022-11-20 11:03:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:41,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:43,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:03:43,492 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 11:03:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:44,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:03:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211230712] [2022-11-20 11:03:44,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211230712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:44,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:03:44,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:03:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574025324] [2022-11-20 11:03:44,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:03:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:03:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:03:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:03:44,041 INFO L87 Difference]: Start difference. First operand 814 states and 1995 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 11:03:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:49,082 INFO L93 Difference]: Finished difference Result 832 states and 2071 transitions. [2022-11-20 11:03:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:03:49,088 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 11:03:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:49,089 INFO L225 Difference]: With dead ends: 832 [2022-11-20 11:03:49,089 INFO L226 Difference]: Without dead ends: 832 [2022-11-20 11:03:49,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:03:49,090 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:49,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 72 Unchecked, 1.8s Time] [2022-11-20 11:03:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-20 11:03:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 820. [2022-11-20 11:03:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 797 states have (on average 2.535759096612296) internal successors, (2021), 819 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2021 transitions. [2022-11-20 11:03:49,100 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2021 transitions. Word has length 14 [2022-11-20 11:03:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:49,100 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 2021 transitions. [2022-11-20 11:03:49,100 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 11:03:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2021 transitions. [2022-11-20 11:03:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:03:49,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:49,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:49,318 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:03:49,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2006071546, now seen corresponding path program 2 times [2022-11-20 11:03:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:03:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240456062] [2022-11-20 11:03:49,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:49,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:03:49,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:03:49,320 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:03:49,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:03:49,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:49,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:03:50,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:50,566 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:03:50,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 8 treesize of output 7 [2022-11-20 11:03:51,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:03:51,253 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 11:03:51,283 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:03:51,283 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 11:03:51,858 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:03:51,858 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 11:03:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:54,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:58,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:03:58,423 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 11:03:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:03:58,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:03:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240456062] [2022-11-20 11:03:58,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240456062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:58,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:03:58,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:03:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494652521] [2022-11-20 11:03:58,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:58,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:03:58,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:03:58,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:03:58,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:03:58,984 INFO L87 Difference]: Start difference. First operand 820 states and 2021 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 11:04:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:01,799 INFO L93 Difference]: Finished difference Result 837 states and 2068 transitions. [2022-11-20 11:04:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:04:01,804 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 11:04:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:01,805 INFO L225 Difference]: With dead ends: 837 [2022-11-20 11:04:01,806 INFO L226 Difference]: Without dead ends: 837 [2022-11-20 11:04:01,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:04:01,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:01,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 26 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 145 Unchecked, 1.6s Time] [2022-11-20 11:04:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-20 11:04:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 820. [2022-11-20 11:04:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 797 states have (on average 2.535759096612296) internal successors, (2021), 819 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2021 transitions. [2022-11-20 11:04:01,822 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2021 transitions. Word has length 14 [2022-11-20 11:04:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 2021 transitions. [2022-11-20 11:04:01,823 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 11:04:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2021 transitions. [2022-11-20 11:04:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:04:01,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:01,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:01,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:02,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:04:02,039 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:04:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2006071481, now seen corresponding path program 1 times [2022-11-20 11:04:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:04:02,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566598663] [2022-11-20 11:04:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:02,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:04:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:04:02,041 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:04:02,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:04:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 11:04:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:02,849 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:04:02,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-20 11:04:03,017 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:04:03,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:04:03,906 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:04:03,907 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 11:04:04,154 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:04:04,154 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 11:04:04,998 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:04:04,998 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 11:04:06,169 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:04:06,169 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 46 treesize of output 52 [2022-11-20 11:04:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:04:12,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:04:21,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:04:21,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566598663] [2022-11-20 11:04:21,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566598663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:21,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:04:21,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:04:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497772838] [2022-11-20 11:04:21,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:04:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:04:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:04:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:04:21,261 INFO L87 Difference]: Start difference. First operand 820 states and 2021 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 11:04:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:22,939 INFO L93 Difference]: Finished difference Result 827 states and 2045 transitions. [2022-11-20 11:04:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:04:22,945 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 11:04:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:22,946 INFO L225 Difference]: With dead ends: 827 [2022-11-20 11:04:22,946 INFO L226 Difference]: Without dead ends: 827 [2022-11-20 11:04:22,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:04:22,947 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:22,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 179 Unchecked, 1.7s Time] [2022-11-20 11:04:22,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-11-20 11:04:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 819. [2022-11-20 11:04:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 796 states have (on average 2.5339195979899496) internal successors, (2017), 818 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2017 transitions. [2022-11-20 11:04:22,959 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2017 transitions. Word has length 14 [2022-11-20 11:04:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:22,960 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 2017 transitions. [2022-11-20 11:04:22,960 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 11:04:22,960 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2017 transitions. [2022-11-20 11:04:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:04:22,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:22,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:22,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:04:23,180 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:04:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2015729531, now seen corresponding path program 2 times [2022-11-20 11:04:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:04:23,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330535405] [2022-11-20 11:04:23,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:23,181 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 11:04:23,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:04:23,182 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:04:23,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:04:23,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:23,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:04:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:24,493 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-20 11:04:24,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:04:24,873 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:04:24,873 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 11:04:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:04:26,512 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 11:04:26,637 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:04:26,638 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 11:04:27,519 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 11:04:27,519 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 11:04:29,317 INFO L321 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-11-20 11:04:29,317 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 3 case distinctions, treesize of input 43 treesize of output 62 [2022-11-20 11:04:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:04:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:04:47,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:04:47,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330535405] [2022-11-20 11:04:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330535405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:47,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:04:47,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:04:47,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798867283] [2022-11-20 11:04:47,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:04:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:04:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:04:47,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:04:47,554 INFO L87 Difference]: Start difference. First operand 819 states and 2017 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 11:04:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:04:53,704 INFO L93 Difference]: Finished difference Result 867 states and 2135 transitions. [2022-11-20 11:04:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:04:53,710 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 11:04:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:04:53,711 INFO L225 Difference]: With dead ends: 867 [2022-11-20 11:04:53,712 INFO L226 Difference]: Without dead ends: 867 [2022-11-20 11:04:53,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:04:53,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:04:53,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 188 Unchecked, 3.4s Time] [2022-11-20 11:04:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-20 11:04:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 819. [2022-11-20 11:04:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 796 states have (on average 2.508793969849246) internal successors, (1997), 818 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1997 transitions. [2022-11-20 11:04:53,722 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1997 transitions. Word has length 14 [2022-11-20 11:04:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:04:53,722 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1997 transitions. [2022-11-20 11:04:53,722 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 11:04:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1997 transitions. [2022-11-20 11:04:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:04:53,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:04:53,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:53,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:04:53,928 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-11-20 11:04:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2015836236, now seen corresponding path program 1 times [2022-11-20 11:04:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:04:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135368505] [2022-11-20 11:04:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:53,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:04:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:04:53,930 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:04:53,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06e7ec5a-92c9-4eb0-b250-fb1949b06da0/bin/uautomizer-ug76WZFUDN/mathsat -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 11:04:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:04:54,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:04:54,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:04:55,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:04:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135368505] [2022-11-20 11:04:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135368505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:55,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:04:55,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:04:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562761529] [2022-11-20 11:04:55,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:04:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:04:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:04:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:04:55,289 INFO L87 Difference]: Start difference. First operand 819 states and 1997 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)