./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro --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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:31:55,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:31:55,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:31:55,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:31:55,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:31:55,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:31:55,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:31:55,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:31:55,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:31:55,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:31:55,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:31:55,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:31:55,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:31:55,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:31:55,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:31:55,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:31:55,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:31:55,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:31:55,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:31:55,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:31:55,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:31:55,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:31:55,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:31:55,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:31:55,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:31:55,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:31:55,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:31:55,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:31:55,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:31:55,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:31:55,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:31:55,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:31:55,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:31:55,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:31:55,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:31:55,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:31:55,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:31:55,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:31:55,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:31:55,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:31:55,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:31:55,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 19:31:55,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:31:55,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:31:55,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:31:55,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:31:55,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:31:55,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:31:55,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:31:55,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:31:55,516 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:31:55,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:31:55,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:31:55,516 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:31:55,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:31:55,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:31:55,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:31:55,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 19:31:55,517 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 19:31:55,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 19:31:55,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:31:55,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:31:55,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:31:55,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:31:55,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:31:55,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:31:55,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:31:55,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:31:55,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:31:55,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:31:55,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:31:55,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:31:55,520 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_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-18 19:31:55,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:31:55,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:31:55,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:31:55,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:31:55,781 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:31:55,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-18 19:31:55,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/481147ea7/cf29ff81716b45ce82293c037771eabc/FLAGff690d59a [2022-11-18 19:31:56,296 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:31:56,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-18 19:31:56,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/481147ea7/cf29ff81716b45ce82293c037771eabc/FLAGff690d59a [2022-11-18 19:31:56,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/481147ea7/cf29ff81716b45ce82293c037771eabc [2022-11-18 19:31:56,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:31:56,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:31:56,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:31:56,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:31:56,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:31:56,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:31:56" (1/1) ... [2022-11-18 19:31:56,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4112645a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:56, skipping insertion in model container [2022-11-18 19:31:56,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:31:56" (1/1) ... [2022-11-18 19:31:56,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:31:56,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:31:57,015 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-18 19:31:57,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:31:57,038 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) [2022-11-18 19:31:57,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bc37164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:31:57, skipping insertion in model container [2022-11-18 19:31:57,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:31:57,040 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 19:31:57,041 INFO L158 Benchmark]: Toolchain (without parser) took 336.08ms. Allocated memory is still 102.8MB. Free memory was 72.3MB in the beginning and 80.0MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 19:31:57,042 INFO L158 Benchmark]: CDTParser took 1.90ms. Allocated memory is still 102.8MB. Free memory was 57.1MB in the beginning and 57.1MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:31:57,043 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.35ms. Allocated memory is still 102.8MB. Free memory was 72.3MB in the beginning and 80.0MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 19:31:57,045 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.90ms. Allocated memory is still 102.8MB. Free memory was 57.1MB in the beginning and 57.1MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.35ms. Allocated memory is still 102.8MB. Free memory was 72.3MB in the beginning and 80.0MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro --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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:31:59,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:31:59,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:31:59,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:31:59,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:31:59,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:31:59,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:31:59,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:31:59,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:31:59,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:31:59,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:31:59,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:31:59,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:31:59,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:31:59,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:31:59,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:31:59,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:31:59,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:31:59,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:31:59,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:31:59,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:31:59,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:31:59,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:31:59,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:31:59,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:31:59,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:31:59,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:31:59,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:31:59,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:31:59,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:31:59,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:31:59,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:31:59,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:31:59,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:31:59,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:31:59,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:31:59,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:31:59,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:31:59,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:31:59,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:31:59,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:31:59,428 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 19:31:59,470 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:31:59,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:31:59,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:31:59,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:31:59,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:31:59,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:31:59,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:31:59,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:31:59,472 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:31:59,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:31:59,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 19:31:59,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 19:31:59,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 19:31:59,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:31:59,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:31:59,474 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 19:31:59,475 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 19:31:59,475 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:31:59,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:31:59,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:31:59,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:31:59,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:31:59,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:31:59,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:31:59,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:31:59,479 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 19:31:59,479 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 19:31:59,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 19:31:59,480 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_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-18 19:31:59,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:31:59,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:31:59,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:31:59,877 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:31:59,878 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:31:59,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-18 19:31:59,951 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/9748a5068/1fe2540153cb413aaa63fc24afd14120/FLAG72636867f [2022-11-18 19:32:00,549 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:32:00,550 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-18 19:32:00,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/9748a5068/1fe2540153cb413aaa63fc24afd14120/FLAG72636867f [2022-11-18 19:32:00,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/data/9748a5068/1fe2540153cb413aaa63fc24afd14120 [2022-11-18 19:32:00,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:32:00,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:32:00,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:00,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:32:00,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:32:00,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:00" (1/1) ... [2022-11-18 19:32:00,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a6d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:00, skipping insertion in model container [2022-11-18 19:32:00,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:32:00" (1/1) ... [2022-11-18 19:32:00,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:32:00,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:32:01,192 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-18 19:32:01,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:01,239 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 19:32:01,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:32:01,284 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-18 19:32:01,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:01,309 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:32:01,345 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-18 19:32:01,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:32:01,373 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:32:01,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01 WrapperNode [2022-11-18 19:32:01,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:32:01,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:01,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:32:01,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:32:01,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,454 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 185 [2022-11-18 19:32:01,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:32:01,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:32:01,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:32:01,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:32:01,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,507 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:32:01,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:32:01,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:32:01,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:32:01,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (1/1) ... [2022-11-18 19:32:01,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:32:01,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:32:01,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:32:01,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:32:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:32:01,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 19:32:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:32:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 19:32:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:32:01,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:32:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:32:01,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:32:01,597 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:32:01,597 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:32:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:32:01,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:32:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:32:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:32:01,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:32:01,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:32:01,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 19:32:01,601 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:32:01,768 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:32:01,770 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:32:02,413 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:32:02,715 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:32:02,716 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 19:32:02,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:02 BoogieIcfgContainer [2022-11-18 19:32:02,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:32:02,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:32:02,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:32:02,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:32:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:32:00" (1/3) ... [2022-11-18 19:32:02,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a85ed8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:02, skipping insertion in model container [2022-11-18 19:32:02,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:32:01" (2/3) ... [2022-11-18 19:32:02,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a85ed8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:32:02, skipping insertion in model container [2022-11-18 19:32:02,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:32:02" (3/3) ... [2022-11-18 19:32:02,738 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2022-11-18 19:32:02,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:32:02,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-18 19:32:02,761 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:32:02,865 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:32:02,903 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 19:32:02,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-18 19:32:02,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-18 19:32:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 174 transitions, 372 flow [2022-11-18 19:32:03,057 INFO L130 PetriNetUnfolder]: 12/171 cut-off events. [2022-11-18 19:32:03,057 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:32:03,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 12/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2022-11-18 19:32:03,067 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-11-18 19:32:35,069 INFO L134 LiptonReduction]: Checked pairs total: 3015 [2022-11-18 19:32:35,069 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-18 19:32:35,078 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-18 19:32:35,143 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:35,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:32:35,171 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;@f09c6c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:32:35,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-18 19:32:35,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:32:35,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:35,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:32:35,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:35,189 INFO L85 PathProgramCache]: Analyzing trace with hash 27028, now seen corresponding path program 1 times [2022-11-18 19:32:35,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697815480] [2022-11-18 19:32:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:35,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:35,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:35,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:35,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:35,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:32:35,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:35,593 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-18 19:32:35,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-18 19:32:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:35,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:35,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:35,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697815480] [2022-11-18 19:32:35,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697815480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:35,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:35,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032749027] [2022-11-18 19:32:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:35,730 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 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) [2022-11-18 19:32:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:35,959 INFO L93 Difference]: Finished difference Result 750 states and 2570 transitions. [2022-11-18 19:32:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:35,962 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 [2022-11-18 19:32:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:35,982 INFO L225 Difference]: With dead ends: 750 [2022-11-18 19:32:35,983 INFO L226 Difference]: Without dead ends: 750 [2022-11-18 19:32:35,983 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 [2022-11-18 19:32:35,987 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:35,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-18 19:32:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-18 19:32:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-18 19:32:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.165316045380875) internal successors, (2570), 749 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2570 transitions. [2022-11-18 19:32:36,087 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2570 transitions. Word has length 2 [2022-11-18 19:32:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:36,088 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2570 transitions. [2022-11-18 19:32:36,088 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) [2022-11-18 19:32:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2570 transitions. [2022-11-18 19:32:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:32:36,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:36,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:32:36,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:36,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:36,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 27030, now seen corresponding path program 1 times [2022-11-18 19:32:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:36,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877364927] [2022-11-18 19:32:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:36,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:36,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:36,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:32:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:36,611 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-18 19:32:36,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-18 19:32:36,664 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 19:32:36,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 19:32:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:36,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:36,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:36,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877364927] [2022-11-18 19:32:36,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877364927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:36,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:36,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:36,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293966992] [2022-11-18 19:32:36,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:36,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:36,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:36,718 INFO L87 Difference]: Start difference. First operand 750 states and 2570 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) [2022-11-18 19:32:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:36,946 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2022-11-18 19:32:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:36,946 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 [2022-11-18 19:32:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:36,953 INFO L225 Difference]: With dead ends: 750 [2022-11-18 19:32:36,953 INFO L226 Difference]: Without dead ends: 750 [2022-11-18 19:32:36,954 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 [2022-11-18 19:32:36,955 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:36,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-18 19:32:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-18 19:32:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-18 19:32:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.163695299837926) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2022-11-18 19:32:37,011 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2022-11-18 19:32:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:37,012 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2022-11-18 19:32:37,012 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) [2022-11-18 19:32:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2022-11-18 19:32:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:32:37,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:37,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:32:37,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-18 19:32:37,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:37,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:37,237 INFO L85 PathProgramCache]: Analyzing trace with hash 26871, now seen corresponding path program 1 times [2022-11-18 19:32:37,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:37,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054052512] [2022-11-18 19:32:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:37,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:37,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:37,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:37,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:32:37,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:37,417 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 19:32:37,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 19:32:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:37,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:37,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:37,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054052512] [2022-11-18 19:32:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054052512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:37,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:37,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:37,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325596215] [2022-11-18 19:32:37,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:37,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:37,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:37,445 INFO L87 Difference]: Start difference. First operand 750 states and 2569 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) [2022-11-18 19:32:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:37,659 INFO L93 Difference]: Finished difference Result 749 states and 2567 transitions. [2022-11-18 19:32:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:37,660 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 [2022-11-18 19:32:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:37,666 INFO L225 Difference]: With dead ends: 749 [2022-11-18 19:32:37,666 INFO L226 Difference]: Without dead ends: 749 [2022-11-18 19:32:37,666 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 [2022-11-18 19:32:37,667 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:37,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-18 19:32:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-18 19:32:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.160453808752026) internal successors, (2567), 748 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2567 transitions. [2022-11-18 19:32:37,720 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2567 transitions. Word has length 2 [2022-11-18 19:32:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:37,721 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2567 transitions. [2022-11-18 19:32:37,721 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) [2022-11-18 19:32:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2567 transitions. [2022-11-18 19:32:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:32:37,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:37,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:32:37,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:37,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 26872, now seen corresponding path program 1 times [2022-11-18 19:32:37,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:37,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474977680] [2022-11-18 19:32:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:37,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:37,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:37,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:37,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:32:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:38,170 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:38,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:38,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:38,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:38,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474977680] [2022-11-18 19:32:38,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474977680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:38,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:38,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:38,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990070291] [2022-11-18 19:32:38,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:38,220 INFO L87 Difference]: Start difference. First operand 749 states and 2567 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) [2022-11-18 19:32:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:38,661 INFO L93 Difference]: Finished difference Result 1492 states and 5124 transitions. [2022-11-18 19:32:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:38,662 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 [2022-11-18 19:32:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:38,672 INFO L225 Difference]: With dead ends: 1492 [2022-11-18 19:32:38,672 INFO L226 Difference]: Without dead ends: 1492 [2022-11-18 19:32:38,672 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 [2022-11-18 19:32:38,677 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:38,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:32:38,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2022-11-18 19:32:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 749. [2022-11-18 19:32:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-18 19:32:38,718 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-18 19:32:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:38,718 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-18 19:32:38,719 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) [2022-11-18 19:32:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-18 19:32:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:32:38,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:38,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:32:38,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:32:38,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:38,931 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash 838050, now seen corresponding path program 1 times [2022-11-18 19:32:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:38,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914723782] [2022-11-18 19:32:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:38,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:38,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:38,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:39,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 19:32:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:39,151 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-18 19:32:39,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-18 19:32:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:32:39,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:39,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:39,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914723782] [2022-11-18 19:32:39,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914723782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:39,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:39,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364485322] [2022-11-18 19:32:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:39,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:39,240 INFO L87 Difference]: Start difference. First operand 749 states and 2566 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:39,408 INFO L93 Difference]: Finished difference Result 748 states and 2565 transitions. [2022-11-18 19:32:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 19:32:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:39,414 INFO L225 Difference]: With dead ends: 748 [2022-11-18 19:32:39,414 INFO L226 Difference]: Without dead ends: 748 [2022-11-18 19:32:39,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:39,415 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:39,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-18 19:32:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-18 19:32:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-18 19:32:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 747 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2565 transitions. [2022-11-18 19:32:39,444 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2565 transitions. Word has length 3 [2022-11-18 19:32:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:39,445 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2565 transitions. [2022-11-18 19:32:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2565 transitions. [2022-11-18 19:32:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:32:39,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:39,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:32:39,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-18 19:32:39,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:39,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:39,657 INFO L85 PathProgramCache]: Analyzing trace with hash 838052, now seen corresponding path program 1 times [2022-11-18 19:32:39,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:39,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812157330] [2022-11-18 19:32:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:39,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:39,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:39,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:39,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:39,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 19:32:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:39,911 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-18 19:32:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-18 19:32:39,942 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 19:32:39,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 19:32:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:40,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:40,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:40,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812157330] [2022-11-18 19:32:40,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812157330] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:32:40,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:32:40,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-18 19:32:40,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440995702] [2022-11-18 19:32:40,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:32:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:40,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:32:40,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:40,194 INFO L87 Difference]: Start difference. First operand 748 states and 2565 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:40,465 INFO L93 Difference]: Finished difference Result 622 states and 2064 transitions. [2022-11-18 19:32:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 19:32:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:40,470 INFO L225 Difference]: With dead ends: 622 [2022-11-18 19:32:40,470 INFO L226 Difference]: Without dead ends: 622 [2022-11-18 19:32:40,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:40,471 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:40,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:32:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-18 19:32:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-11-18 19:32:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 621 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 2064 transitions. [2022-11-18 19:32:40,495 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 2064 transitions. Word has length 3 [2022-11-18 19:32:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:40,496 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 2064 transitions. [2022-11-18 19:32:40,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 2064 transitions. [2022-11-18 19:32:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:32:40,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:40,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:32:40,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:40,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 837894, now seen corresponding path program 1 times [2022-11-18 19:32:40,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:40,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255185469] [2022-11-18 19:32:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:40,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:40,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:40,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:40,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:40,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:32:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:40,951 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:40,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:41,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:41,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255185469] [2022-11-18 19:32:41,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255185469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:41,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:41,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 19:32:41,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436871000] [2022-11-18 19:32:41,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:32:41,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:32:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:41,293 INFO L87 Difference]: Start difference. First operand 622 states and 2064 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) [2022-11-18 19:32:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:42,012 INFO L93 Difference]: Finished difference Result 1861 states and 6186 transitions. [2022-11-18 19:32:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:42,013 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 [2022-11-18 19:32:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:42,026 INFO L225 Difference]: With dead ends: 1861 [2022-11-18 19:32:42,026 INFO L226 Difference]: Without dead ends: 1861 [2022-11-18 19:32:42,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:32:42,027 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 223 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:42,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 12 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 19:32:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-18 19:32:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 625. [2022-11-18 19:32:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 522 states have (on average 3.9655172413793105) internal successors, (2070), 624 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2070 transitions. [2022-11-18 19:32:42,065 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2070 transitions. Word has length 3 [2022-11-18 19:32:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:42,065 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2070 transitions. [2022-11-18 19:32:42,065 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) [2022-11-18 19:32:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2070 transitions. [2022-11-18 19:32:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 19:32:42,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:42,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 19:32:42,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:42,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:42,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:42,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:42,278 INFO L85 PathProgramCache]: Analyzing trace with hash 25995132, now seen corresponding path program 1 times [2022-11-18 19:32:42,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:42,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719229666] [2022-11-18 19:32:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:42,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:42,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:42,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:32:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:42,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:42,507 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:32:42,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 19:32:42,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 19:32:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:42,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:42,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719229666] [2022-11-18 19:32:42,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719229666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:42,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:42,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117144435] [2022-11-18 19:32:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:42,609 INFO L87 Difference]: Start difference. First operand 625 states and 2070 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:42,744 INFO L93 Difference]: Finished difference Result 628 states and 2080 transitions. [2022-11-18 19:32:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 19:32:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:42,749 INFO L225 Difference]: With dead ends: 628 [2022-11-18 19:32:42,749 INFO L226 Difference]: Without dead ends: 628 [2022-11-18 19:32:42,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:42,750 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:42,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-18 19:32:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-18 19:32:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-18 19:32:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.961904761904762) internal successors, (2080), 627 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2080 transitions. [2022-11-18 19:32:42,772 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2080 transitions. Word has length 4 [2022-11-18 19:32:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:42,772 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2080 transitions. [2022-11-18 19:32:42,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2080 transitions. [2022-11-18 19:32:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 19:32:42,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:42,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 19:32:42,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:42,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:42,992 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash 25995133, now seen corresponding path program 1 times [2022-11-18 19:32:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:42,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453809741] [2022-11-18 19:32:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:42,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:42,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:43,156 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 19:32:43,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-18 19:32:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:43,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:43,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453809741] [2022-11-18 19:32:43,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453809741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:43,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:43,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004383985] [2022-11-18 19:32:43,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:43,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:43,256 INFO L87 Difference]: Start difference. First operand 628 states and 2080 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:43,381 INFO L93 Difference]: Finished difference Result 628 states and 2078 transitions. [2022-11-18 19:32:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 19:32:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:43,386 INFO L225 Difference]: With dead ends: 628 [2022-11-18 19:32:43,386 INFO L226 Difference]: Without dead ends: 628 [2022-11-18 19:32:43,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:43,387 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:43,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-18 19:32:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-18 19:32:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-18 19:32:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.958095238095238) internal successors, (2078), 627 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2078 transitions. [2022-11-18 19:32:43,409 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2078 transitions. Word has length 4 [2022-11-18 19:32:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:43,409 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2078 transitions. [2022-11-18 19:32:43,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2078 transitions. [2022-11-18 19:32:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:32:43,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:43,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:32:43,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:43,622 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 805844397, now seen corresponding path program 1 times [2022-11-18 19:32:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419343445] [2022-11-18 19:32:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:43,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:43,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:43,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:43,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:32:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:43,819 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 19:32:43,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 19:32:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:43,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:43,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:43,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419343445] [2022-11-18 19:32:43,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419343445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:43,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:43,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:32:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404612470] [2022-11-18 19:32:43,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:32:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:32:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:32:43,853 INFO L87 Difference]: Start difference. First operand 628 states and 2078 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:44,064 INFO L93 Difference]: Finished difference Result 365 states and 1174 transitions. [2022-11-18 19:32:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:32:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 19:32:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:44,067 INFO L225 Difference]: With dead ends: 365 [2022-11-18 19:32:44,067 INFO L226 Difference]: Without dead ends: 365 [2022-11-18 19:32:44,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:44,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:44,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-18 19:32:44,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-18 19:32:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 324 states have (on average 3.623456790123457) internal successors, (1174), 364 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1174 transitions. [2022-11-18 19:32:44,081 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1174 transitions. Word has length 5 [2022-11-18 19:32:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:44,081 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 1174 transitions. [2022-11-18 19:32:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:44,082 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1174 transitions. [2022-11-18 19:32:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:32:44,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:44,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:32:44,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:44,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:44,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:44,294 INFO L85 PathProgramCache]: Analyzing trace with hash 805844398, now seen corresponding path program 1 times [2022-11-18 19:32:44,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:44,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228271921] [2022-11-18 19:32:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:44,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:44,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:32:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:44,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:44,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:44,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:44,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228271921] [2022-11-18 19:32:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228271921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:44,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:44,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:32:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134249539] [2022-11-18 19:32:44,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:44,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:44,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:44,630 INFO L87 Difference]: Start difference. First operand 365 states and 1174 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) [2022-11-18 19:32:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:45,005 INFO L93 Difference]: Finished difference Result 583 states and 1863 transitions. [2022-11-18 19:32:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:32:45,006 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 [2022-11-18 19:32:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:45,013 INFO L225 Difference]: With dead ends: 583 [2022-11-18 19:32:45,013 INFO L226 Difference]: Without dead ends: 583 [2022-11-18 19:32:45,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:32:45,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:45,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:32:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-18 19:32:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 433. [2022-11-18 19:32:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 392 states have (on average 3.75765306122449) internal successors, (1473), 432 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1473 transitions. [2022-11-18 19:32:45,037 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1473 transitions. Word has length 5 [2022-11-18 19:32:45,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:45,037 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 1473 transitions. [2022-11-18 19:32:45,037 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) [2022-11-18 19:32:45,037 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1473 transitions. [2022-11-18 19:32:45,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:32:45,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:45,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:32:45,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:45,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 805387274, now seen corresponding path program 1 times [2022-11-18 19:32:45,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:45,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286275630] [2022-11-18 19:32:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:45,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:45,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:32:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:45,489 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-18 19:32:45,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-18 19:32:45,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 19:32:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:45,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:45,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:45,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286275630] [2022-11-18 19:32:45,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286275630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:45,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:45,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 19:32:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75035503] [2022-11-18 19:32:45,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:32:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:32:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:32:45,996 INFO L87 Difference]: Start difference. First operand 433 states and 1473 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:46,339 INFO L93 Difference]: Finished difference Result 820 states and 2832 transitions. [2022-11-18 19:32:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:32:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 19:32:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:46,345 INFO L225 Difference]: With dead ends: 820 [2022-11-18 19:32:46,345 INFO L226 Difference]: Without dead ends: 820 [2022-11-18 19:32:46,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:32:46,346 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:46,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-11-18 19:32:46,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-18 19:32:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 423. [2022-11-18 19:32:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 386 states have (on average 3.7357512953367875) internal successors, (1442), 422 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1442 transitions. [2022-11-18 19:32:46,363 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1442 transitions. Word has length 5 [2022-11-18 19:32:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:46,364 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 1442 transitions. [2022-11-18 19:32:46,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1442 transitions. [2022-11-18 19:32:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:32:46,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:46,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:32:46,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:46,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:46,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:46,577 INFO L85 PathProgramCache]: Analyzing trace with hash 805387275, now seen corresponding path program 1 times [2022-11-18 19:32:46,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:46,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357461938] [2022-11-18 19:32:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:46,579 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:46,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:32:46,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:46,795 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-18 19:32:46,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-18 19:32:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:32:46,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:46,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357461938] [2022-11-18 19:32:46,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357461938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:46,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:46,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845348117] [2022-11-18 19:32:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:46,832 INFO L87 Difference]: Start difference. First operand 423 states and 1442 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:46,998 INFO L93 Difference]: Finished difference Result 402 states and 1378 transitions. [2022-11-18 19:32:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 19:32:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:47,002 INFO L225 Difference]: With dead ends: 402 [2022-11-18 19:32:47,002 INFO L226 Difference]: Without dead ends: 402 [2022-11-18 19:32:47,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:47,003 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:47,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-18 19:32:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2022-11-18 19:32:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 368 states have (on average 3.7282608695652173) internal successors, (1372), 398 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1372 transitions. [2022-11-18 19:32:47,021 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1372 transitions. Word has length 5 [2022-11-18 19:32:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:47,021 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 1372 transitions. [2022-11-18 19:32:47,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1372 transitions. [2022-11-18 19:32:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:32:47,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:47,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:32:47,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:47,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:47,240 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash -788622522, now seen corresponding path program 1 times [2022-11-18 19:32:47,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:47,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375964791] [2022-11-18 19:32:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:47,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:47,242 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:32:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:47,472 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:47,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:47,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:47,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375964791] [2022-11-18 19:32:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375964791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:47,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:47,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:32:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856026823] [2022-11-18 19:32:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:47,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:47,623 INFO L87 Difference]: Start difference. First operand 399 states and 1372 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:47,855 INFO L93 Difference]: Finished difference Result 402 states and 1377 transitions. [2022-11-18 19:32:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:32:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:47,862 INFO L225 Difference]: With dead ends: 402 [2022-11-18 19:32:47,862 INFO L226 Difference]: Without dead ends: 402 [2022-11-18 19:32:47,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:47,867 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:47,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-18 19:32:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-18 19:32:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-18 19:32:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 371 states have (on average 3.711590296495957) internal successors, (1377), 401 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1377 transitions. [2022-11-18 19:32:47,883 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1377 transitions. Word has length 6 [2022-11-18 19:32:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:47,883 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 1377 transitions. [2022-11-18 19:32:47,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1377 transitions. [2022-11-18 19:32:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:32:47,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:47,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:32:47,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:48,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:48,098 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash -788459601, now seen corresponding path program 1 times [2022-11-18 19:32:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:48,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893672860] [2022-11-18 19:32:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:48,099 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 [2022-11-18 19:32:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:48,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:48,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:32:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:48,293 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 19:32:48,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-18 19:32:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:48,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:48,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893672860] [2022-11-18 19:32:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893672860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:48,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:48,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:48,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113753166] [2022-11-18 19:32:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:48,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:48,331 INFO L87 Difference]: Start difference. First operand 402 states and 1377 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:48,495 INFO L93 Difference]: Finished difference Result 378 states and 1305 transitions. [2022-11-18 19:32:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:32:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:48,498 INFO L225 Difference]: With dead ends: 378 [2022-11-18 19:32:48,499 INFO L226 Difference]: Without dead ends: 378 [2022-11-18 19:32:48,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:48,500 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:48,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-18 19:32:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-18 19:32:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 3.696883852691218) internal successors, (1305), 377 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) [2022-11-18 19:32:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1305 transitions. [2022-11-18 19:32:48,512 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1305 transitions. Word has length 6 [2022-11-18 19:32:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:48,513 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1305 transitions. [2022-11-18 19:32:48,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1305 transitions. [2022-11-18 19:32:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:32:48,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:48,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:32:48,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-18 19:32:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:48,727 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -788459599, now seen corresponding path program 1 times [2022-11-18 19:32:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:48,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775706072] [2022-11-18 19:32:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:48,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:48,729 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:48,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:48,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:32:48,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:48,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:32:48,922 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:32:48,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 19:32:48,933 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 [2022-11-18 19:32:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:48,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:48,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775706072] [2022-11-18 19:32:48,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775706072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:48,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:48,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:32:48,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627823298] [2022-11-18 19:32:48,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:48,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:32:48,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:32:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:48,970 INFO L87 Difference]: Start difference. First operand 378 states and 1305 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:49,128 INFO L93 Difference]: Finished difference Result 354 states and 1233 transitions. [2022-11-18 19:32:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:32:49,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:32:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:49,131 INFO L225 Difference]: With dead ends: 354 [2022-11-18 19:32:49,131 INFO L226 Difference]: Without dead ends: 354 [2022-11-18 19:32:49,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:32:49,132 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:49,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:32:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-18 19:32:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-18 19:32:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 335 states have (on average 3.680597014925373) internal successors, (1233), 353 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1233 transitions. [2022-11-18 19:32:49,142 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1233 transitions. Word has length 6 [2022-11-18 19:32:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:49,143 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 1233 transitions. [2022-11-18 19:32:49,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1233 transitions. [2022-11-18 19:32:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:32:49,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:49,144 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 19:32:49,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:49,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:49,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -803275656, now seen corresponding path program 2 times [2022-11-18 19:32:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814724127] [2022-11-18 19:32:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:32:49,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:49,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:49,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:49,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:32:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:32:49,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:49,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:49,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:50,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814724127] [2022-11-18 19:32:50,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814724127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:50,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:50,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:32:50,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185474462] [2022-11-18 19:32:50,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:50,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:32:50,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:32:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:32:50,501 INFO L87 Difference]: Start difference. First operand 354 states and 1233 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) [2022-11-18 19:32:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:55,447 INFO L93 Difference]: Finished difference Result 3376 states and 12025 transitions. [2022-11-18 19:32:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:32:55,449 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 [2022-11-18 19:32:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:55,495 INFO L225 Difference]: With dead ends: 3376 [2022-11-18 19:32:55,502 INFO L226 Difference]: Without dead ends: 3376 [2022-11-18 19:32:55,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:32:55,503 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 801 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:55,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 87 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-18 19:32:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2022-11-18 19:32:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 360. [2022-11-18 19:32:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 341 states have (on average 3.6510263929618767) internal successors, (1245), 359 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1245 transitions. [2022-11-18 19:32:55,541 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1245 transitions. Word has length 6 [2022-11-18 19:32:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:55,542 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 1245 transitions. [2022-11-18 19:32:55,542 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) [2022-11-18 19:32:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1245 transitions. [2022-11-18 19:32:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:32:55,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:55,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:32:55,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:55,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:55,755 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:55,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1322500900, now seen corresponding path program 1 times [2022-11-18 19:32:55,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:55,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998009524] [2022-11-18 19:32:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:55,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:55,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:55,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:55,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:32:55,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:56,023 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:56,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:56,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:56,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998009524] [2022-11-18 19:32:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998009524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:32:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431161269] [2022-11-18 19:32:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:56,177 INFO L87 Difference]: Start difference. First operand 360 states and 1245 transitions. Second operand has 5 states, 5 states have (on average 1.4) 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) [2022-11-18 19:32:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:56,404 INFO L93 Difference]: Finished difference Result 361 states and 1247 transitions. [2022-11-18 19:32:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) 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 [2022-11-18 19:32:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:56,407 INFO L225 Difference]: With dead ends: 361 [2022-11-18 19:32:56,407 INFO L226 Difference]: Without dead ends: 361 [2022-11-18 19:32:56,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:56,408 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:56,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-18 19:32:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-18 19:32:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-11-18 19:32:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 342 states have (on average 3.646198830409357) internal successors, (1247), 360 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1247 transitions. [2022-11-18 19:32:56,418 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1247 transitions. Word has length 7 [2022-11-18 19:32:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:56,419 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 1247 transitions. [2022-11-18 19:32:56,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) 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) [2022-11-18 19:32:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1247 transitions. [2022-11-18 19:32:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:32:56,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:56,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:32:56,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:56,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:56,632 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1327517320, now seen corresponding path program 2 times [2022-11-18 19:32:56,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:56,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668857490] [2022-11-18 19:32:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:32:56,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:56,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:56,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:56,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:32:56,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:32:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:32:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:56,907 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:56,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:57,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:32:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:57,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:57,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668857490] [2022-11-18 19:32:57,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668857490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:32:57,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:32:57,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:32:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252452742] [2022-11-18 19:32:57,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:32:57,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:32:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:32:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:32:57,513 INFO L87 Difference]: Start difference. First operand 361 states and 1247 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:58,988 INFO L93 Difference]: Finished difference Result 847 states and 2837 transitions. [2022-11-18 19:32:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:32:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 19:32:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:58,992 INFO L225 Difference]: With dead ends: 847 [2022-11-18 19:32:58,993 INFO L226 Difference]: Without dead ends: 847 [2022-11-18 19:32:58,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:32:58,993 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 281 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:58,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 17 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 19:32:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-18 19:32:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 541. [2022-11-18 19:32:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 522 states have (on average 3.92911877394636) internal successors, (2051), 540 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 2051 transitions. [2022-11-18 19:32:59,024 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 2051 transitions. Word has length 7 [2022-11-18 19:32:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:59,025 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 2051 transitions. [2022-11-18 19:32:59,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 2051 transitions. [2022-11-18 19:32:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:32:59,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:59,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:32:59,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-18 19:32:59,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:59,238 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:32:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:32:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1327551453, now seen corresponding path program 1 times [2022-11-18 19:32:59,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:32:59,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604956470] [2022-11-18 19:32:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:32:59,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:32:59,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:32:59,240 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:32:59,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:32:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:32:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:32:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:32:59,468 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:32:59,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:32:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:32:59,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:32:59,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:32:59,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604956470] [2022-11-18 19:32:59,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604956470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:32:59,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:32:59,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:32:59,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346425615] [2022-11-18 19:32:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:32:59,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:32:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:32:59,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:32:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:32:59,664 INFO L87 Difference]: Start difference. First operand 541 states and 2051 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) [2022-11-18 19:32:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:32:59,808 INFO L93 Difference]: Finished difference Result 543 states and 2060 transitions. [2022-11-18 19:32:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:32:59,809 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 [2022-11-18 19:32:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:32:59,811 INFO L225 Difference]: With dead ends: 543 [2022-11-18 19:32:59,812 INFO L226 Difference]: Without dead ends: 543 [2022-11-18 19:32:59,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:32:59,813 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:32:59,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:32:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-18 19:32:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2022-11-18 19:32:59,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 524 states have (on average 3.931297709923664) internal successors, (2060), 542 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:32:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 2060 transitions. [2022-11-18 19:32:59,828 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 2060 transitions. Word has length 7 [2022-11-18 19:32:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:32:59,828 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 2060 transitions. [2022-11-18 19:32:59,829 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) [2022-11-18 19:32:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 2060 transitions. [2022-11-18 19:32:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:32:59,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:32:59,830 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-18 19:32:59,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:00,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:00,041 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 868278858, now seen corresponding path program 2 times [2022-11-18 19:33:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:00,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799842104] [2022-11-18 19:33:00,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:00,044 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:00,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:00,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:33:00,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:33:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:33:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:33:00,262 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 19:33:00,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 19:33:00,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 19:33:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:33:00,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:00,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799842104] [2022-11-18 19:33:00,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799842104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:00,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:00,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:33:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775422878] [2022-11-18 19:33:00,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:00,393 INFO L87 Difference]: Start difference. First operand 543 states and 2060 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:00,506 INFO L93 Difference]: Finished difference Result 541 states and 2055 transitions. [2022-11-18 19:33:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 19:33:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:00,509 INFO L225 Difference]: With dead ends: 541 [2022-11-18 19:33:00,509 INFO L226 Difference]: Without dead ends: 541 [2022-11-18 19:33:00,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:00,510 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:00,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-18 19:33:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-18 19:33:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-11-18 19:33:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 522 states have (on average 3.9367816091954024) internal successors, (2055), 540 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 2055 transitions. [2022-11-18 19:33:00,525 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 2055 transitions. Word has length 7 [2022-11-18 19:33:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:00,525 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 2055 transitions. [2022-11-18 19:33:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 2055 transitions. [2022-11-18 19:33:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:33:00,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:00,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:00,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:00,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:00,738 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1795411190, now seen corresponding path program 1 times [2022-11-18 19:33:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:00,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382521449] [2022-11-18 19:33:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:00,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:00,740 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:00,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:33:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:00,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:00,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:00,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382521449] [2022-11-18 19:33:00,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382521449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:00,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:00,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:33:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696751479] [2022-11-18 19:33:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:00,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:00,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:00,869 INFO L87 Difference]: Start difference. First operand 541 states and 2055 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:01,011 INFO L93 Difference]: Finished difference Result 413 states and 1479 transitions. [2022-11-18 19:33:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 19:33:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:01,014 INFO L225 Difference]: With dead ends: 413 [2022-11-18 19:33:01,014 INFO L226 Difference]: Without dead ends: 413 [2022-11-18 19:33:01,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:01,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:01,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:33:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-18 19:33:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-11-18 19:33:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 402 states have (on average 3.6791044776119404) internal successors, (1479), 412 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1479 transitions. [2022-11-18 19:33:01,050 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1479 transitions. Word has length 8 [2022-11-18 19:33:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:01,050 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1479 transitions. [2022-11-18 19:33:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1479 transitions. [2022-11-18 19:33:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:33:01,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:01,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:01,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:01,266 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:01,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:01,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1795412078, now seen corresponding path program 1 times [2022-11-18 19:33:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:01,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804614664] [2022-11-18 19:33:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:01,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:01,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:01,268 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:01,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:01,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:01,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:01,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:01,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:01,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:01,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804614664] [2022-11-18 19:33:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804614664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:01,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:01,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:01,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417040772] [2022-11-18 19:33:01,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:01,716 INFO L87 Difference]: Start difference. First operand 413 states and 1479 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:01,859 INFO L93 Difference]: Finished difference Result 417 states and 1499 transitions. [2022-11-18 19:33:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 19:33:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:01,861 INFO L225 Difference]: With dead ends: 417 [2022-11-18 19:33:01,862 INFO L226 Difference]: Without dead ends: 417 [2022-11-18 19:33:01,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:01,862 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:01,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:33:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-18 19:33:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 415. [2022-11-18 19:33:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 404 states have (on average 3.6831683168316833) internal successors, (1488), 414 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1488 transitions. [2022-11-18 19:33:01,874 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1488 transitions. Word has length 8 [2022-11-18 19:33:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:01,874 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1488 transitions. [2022-11-18 19:33:01,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1488 transitions. [2022-11-18 19:33:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:33:01,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:01,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:01,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:02,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:02,087 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:02,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1795574983, now seen corresponding path program 1 times [2022-11-18 19:33:02,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:02,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553326615] [2022-11-18 19:33:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:02,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:02,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:02,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:02,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:02,335 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:02,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:02,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:02,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553326615] [2022-11-18 19:33:02,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553326615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:02,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:02,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917185393] [2022-11-18 19:33:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:02,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:02,477 INFO L87 Difference]: Start difference. First operand 415 states and 1488 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:02,646 INFO L93 Difference]: Finished difference Result 421 states and 1507 transitions. [2022-11-18 19:33:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 19:33:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:02,649 INFO L225 Difference]: With dead ends: 421 [2022-11-18 19:33:02,649 INFO L226 Difference]: Without dead ends: 421 [2022-11-18 19:33:02,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:02,650 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:02,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-18 19:33:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-18 19:33:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-11-18 19:33:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 410 states have (on average 3.675609756097561) internal successors, (1507), 420 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1507 transitions. [2022-11-18 19:33:02,662 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1507 transitions. Word has length 8 [2022-11-18 19:33:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:02,662 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 1507 transitions. [2022-11-18 19:33:02,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1507 transitions. [2022-11-18 19:33:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:33:02,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:02,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:02,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-18 19:33:02,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:02,875 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1795574828, now seen corresponding path program 2 times [2022-11-18 19:33:02,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:02,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295169844] [2022-11-18 19:33:02,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:02,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:02,877 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:02,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:02,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:03,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:03,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:03,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:03,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295169844] [2022-11-18 19:33:03,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295169844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:03,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:03,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:03,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641195414] [2022-11-18 19:33:03,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:03,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:03,328 INFO L87 Difference]: Start difference. First operand 421 states and 1507 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:03,485 INFO L93 Difference]: Finished difference Result 439 states and 1596 transitions. [2022-11-18 19:33:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 19:33:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:03,487 INFO L225 Difference]: With dead ends: 439 [2022-11-18 19:33:03,487 INFO L226 Difference]: Without dead ends: 439 [2022-11-18 19:33:03,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:03,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:03,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-18 19:33:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-18 19:33:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2022-11-18 19:33:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 428 states have (on average 3.7289719626168223) internal successors, (1596), 438 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1596 transitions. [2022-11-18 19:33:03,500 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1596 transitions. Word has length 8 [2022-11-18 19:33:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:03,500 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 1596 transitions. [2022-11-18 19:33:03,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1596 transitions. [2022-11-18 19:33:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:03,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:03,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:03,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:03,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:03,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash -397396736, now seen corresponding path program 1 times [2022-11-18 19:33:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:03,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050018025] [2022-11-18 19:33:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:03,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:03,715 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:03,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:03,975 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:03,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:04,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:04,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:04,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050018025] [2022-11-18 19:33:04,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050018025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:04,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:04,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:04,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921928890] [2022-11-18 19:33:04,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:04,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:04,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:04,201 INFO L87 Difference]: Start difference. First operand 439 states and 1596 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:04,375 INFO L93 Difference]: Finished difference Result 445 states and 1609 transitions. [2022-11-18 19:33:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:04,378 INFO L225 Difference]: With dead ends: 445 [2022-11-18 19:33:04,378 INFO L226 Difference]: Without dead ends: 445 [2022-11-18 19:33:04,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:04,378 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:04,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:33:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-18 19:33:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-11-18 19:33:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 433 states have (on average 3.7066974595842956) internal successors, (1605), 443 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1605 transitions. [2022-11-18 19:33:04,390 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1605 transitions. Word has length 9 [2022-11-18 19:33:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:04,390 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 1605 transitions. [2022-11-18 19:33:04,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1605 transitions. [2022-11-18 19:33:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:04,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:04,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:04,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:04,603 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash -391062785, now seen corresponding path program 1 times [2022-11-18 19:33:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:04,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814392618] [2022-11-18 19:33:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:04,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:04,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:04,605 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:04,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:04,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:33:04,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:04,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:04,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814392618] [2022-11-18 19:33:04,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814392618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:04,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:04,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:33:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238652275] [2022-11-18 19:33:04,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:33:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:33:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:04,835 INFO L87 Difference]: Start difference. First operand 444 states and 1605 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:05,631 INFO L93 Difference]: Finished difference Result 880 states and 3028 transitions. [2022-11-18 19:33:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:33:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:05,635 INFO L225 Difference]: With dead ends: 880 [2022-11-18 19:33:05,635 INFO L226 Difference]: Without dead ends: 880 [2022-11-18 19:33:05,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:33:05,636 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:05,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 28 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:33:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-18 19:33:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 553. [2022-11-18 19:33:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 542 states have (on average 3.8468634686346865) internal successors, (2085), 552 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 2085 transitions. [2022-11-18 19:33:05,652 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 2085 transitions. Word has length 9 [2022-11-18 19:33:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:05,653 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 2085 transitions. [2022-11-18 19:33:05,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 2085 transitions. [2022-11-18 19:33:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:05,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:05,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:05,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-18 19:33:05,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:05,866 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash -391223396, now seen corresponding path program 2 times [2022-11-18 19:33:05,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:05,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155826776] [2022-11-18 19:33:05,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:05,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:05,867 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:05,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:05,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:06,097 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:06,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:06,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:06,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155826776] [2022-11-18 19:33:06,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155826776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:06,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:06,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:06,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982816139] [2022-11-18 19:33:06,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:06,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:06,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:06,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:06,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:06,344 INFO L87 Difference]: Start difference. First operand 553 states and 2085 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:06,520 INFO L93 Difference]: Finished difference Result 554 states and 2088 transitions. [2022-11-18 19:33:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:06,523 INFO L225 Difference]: With dead ends: 554 [2022-11-18 19:33:06,523 INFO L226 Difference]: Without dead ends: 554 [2022-11-18 19:33:06,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:06,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:06,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-18 19:33:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 553. [2022-11-18 19:33:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 542 states have (on average 3.8468634686346865) internal successors, (2085), 552 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 2085 transitions. [2022-11-18 19:33:06,540 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 2085 transitions. Word has length 9 [2022-11-18 19:33:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:06,540 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 2085 transitions. [2022-11-18 19:33:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 2085 transitions. [2022-11-18 19:33:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:06,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:06,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:06,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:06,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:06,753 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash -391222745, now seen corresponding path program 2 times [2022-11-18 19:33:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:06,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060684682] [2022-11-18 19:33:06,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:06,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:06,756 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:06,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:06,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:33:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:06,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:06,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:06,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060684682] [2022-11-18 19:33:06,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060684682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:06,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:06,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:33:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973073121] [2022-11-18 19:33:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:06,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:33:06,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:33:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:06,959 INFO L87 Difference]: Start difference. First operand 553 states and 2085 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:07,560 INFO L93 Difference]: Finished difference Result 1091 states and 3925 transitions. [2022-11-18 19:33:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:33:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:07,568 INFO L225 Difference]: With dead ends: 1091 [2022-11-18 19:33:07,568 INFO L226 Difference]: Without dead ends: 1091 [2022-11-18 19:33:07,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:33:07,569 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:07,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 15 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:33:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-11-18 19:33:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 583. [2022-11-18 19:33:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 572 states have (on average 3.9388111888111887) internal successors, (2253), 582 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2253 transitions. [2022-11-18 19:33:07,590 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2253 transitions. Word has length 9 [2022-11-18 19:33:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:07,590 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 2253 transitions. [2022-11-18 19:33:07,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2253 transitions. [2022-11-18 19:33:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:07,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:07,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:07,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:07,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:07,803 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 176824410, now seen corresponding path program 1 times [2022-11-18 19:33:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:07,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242964459] [2022-11-18 19:33:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:07,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:07,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:07,805 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:07,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:33:07,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:08,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:08,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242964459] [2022-11-18 19:33:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242964459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:08,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:08,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897937358] [2022-11-18 19:33:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:08,037 INFO L87 Difference]: Start difference. First operand 583 states and 2253 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:08,545 INFO L93 Difference]: Finished difference Result 982 states and 3728 transitions. [2022-11-18 19:33:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:08,550 INFO L225 Difference]: With dead ends: 982 [2022-11-18 19:33:08,550 INFO L226 Difference]: Without dead ends: 982 [2022-11-18 19:33:08,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:08,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:08,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 11 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:33:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-18 19:33:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 870. [2022-11-18 19:33:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 859 states have (on average 3.9278230500582074) internal successors, (3374), 869 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3374 transitions. [2022-11-18 19:33:08,584 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3374 transitions. Word has length 9 [2022-11-18 19:33:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:08,584 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 3374 transitions. [2022-11-18 19:33:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3374 transitions. [2022-11-18 19:33:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:08,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:08,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:08,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:08,798 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash 176824041, now seen corresponding path program 1 times [2022-11-18 19:33:08,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:08,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188164769] [2022-11-18 19:33:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:08,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:08,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:08,801 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:08,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:09,056 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:09,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:09,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:09,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188164769] [2022-11-18 19:33:09,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188164769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:09,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302889458] [2022-11-18 19:33:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:09,270 INFO L87 Difference]: Start difference. First operand 870 states and 3374 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:09,447 INFO L93 Difference]: Finished difference Result 880 states and 3434 transitions. [2022-11-18 19:33:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:09,451 INFO L225 Difference]: With dead ends: 880 [2022-11-18 19:33:09,451 INFO L226 Difference]: Without dead ends: 880 [2022-11-18 19:33:09,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:09,453 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:09,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-18 19:33:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-18 19:33:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 876. [2022-11-18 19:33:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 865 states have (on average 3.9398843930635836) internal successors, (3408), 875 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3408 transitions. [2022-11-18 19:33:09,477 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3408 transitions. Word has length 9 [2022-11-18 19:33:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:09,477 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 3408 transitions. [2022-11-18 19:33:09,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3408 transitions. [2022-11-18 19:33:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:09,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:09,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:09,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-18 19:33:09,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:09,689 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash 176803364, now seen corresponding path program 1 times [2022-11-18 19:33:09,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:09,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497767622] [2022-11-18 19:33:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:09,691 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:09,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:09,951 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:09,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:10,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:10,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497767622] [2022-11-18 19:33:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497767622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:10,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:10,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945572107] [2022-11-18 19:33:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:10,110 INFO L87 Difference]: Start difference. First operand 876 states and 3408 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:10,263 INFO L93 Difference]: Finished difference Result 876 states and 3405 transitions. [2022-11-18 19:33:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:10,268 INFO L225 Difference]: With dead ends: 876 [2022-11-18 19:33:10,269 INFO L226 Difference]: Without dead ends: 876 [2022-11-18 19:33:10,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:10,269 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-18 19:33:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-18 19:33:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2022-11-18 19:33:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 865 states have (on average 3.9364161849710984) internal successors, (3405), 875 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3405 transitions. [2022-11-18 19:33:10,293 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3405 transitions. Word has length 9 [2022-11-18 19:33:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:10,293 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 3405 transitions. [2022-11-18 19:33:10,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3405 transitions. [2022-11-18 19:33:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:10,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:10,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:10,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-18 19:33:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:10,506 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 176798931, now seen corresponding path program 2 times [2022-11-18 19:33:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:10,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83241028] [2022-11-18 19:33:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:10,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:10,508 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:10,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:10,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:10,795 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:10,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:11,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:11,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83241028] [2022-11-18 19:33:11,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83241028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:11,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:11,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:11,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525414128] [2022-11-18 19:33:11,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:11,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:11,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:11,016 INFO L87 Difference]: Start difference. First operand 876 states and 3405 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:11,162 INFO L93 Difference]: Finished difference Result 916 states and 3610 transitions. [2022-11-18 19:33:11,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:11,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:11,165 INFO L225 Difference]: With dead ends: 916 [2022-11-18 19:33:11,165 INFO L226 Difference]: Without dead ends: 916 [2022-11-18 19:33:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:11,166 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:11,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-18 19:33:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-18 19:33:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 871. [2022-11-18 19:33:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 860 states have (on average 3.9267441860465118) internal successors, (3377), 870 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3377 transitions. [2022-11-18 19:33:11,189 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3377 transitions. Word has length 9 [2022-11-18 19:33:11,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:11,189 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 3377 transitions. [2022-11-18 19:33:11,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3377 transitions. [2022-11-18 19:33:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:11,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:11,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:11,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:11,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:11,402 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:11,403 INFO L85 PathProgramCache]: Analyzing trace with hash 171578469, now seen corresponding path program 3 times [2022-11-18 19:33:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:11,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244512869] [2022-11-18 19:33:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:11,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:11,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:11,404 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:11,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:11,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:33:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:11,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:33:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:11,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:11,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244512869] [2022-11-18 19:33:11,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244512869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:11,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:11,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:33:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432081820] [2022-11-18 19:33:11,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:11,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:33:11,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:33:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:11,606 INFO L87 Difference]: Start difference. First operand 871 states and 3377 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:12,188 INFO L93 Difference]: Finished difference Result 1789 states and 6518 transitions. [2022-11-18 19:33:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:33:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:12,192 INFO L225 Difference]: With dead ends: 1789 [2022-11-18 19:33:12,192 INFO L226 Difference]: Without dead ends: 1789 [2022-11-18 19:33:12,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:33:12,193 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:12,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 15 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 19:33:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-11-18 19:33:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 861. [2022-11-18 19:33:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 850 states have (on average 3.9141176470588235) internal successors, (3327), 860 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 3327 transitions. [2022-11-18 19:33:12,219 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 3327 transitions. Word has length 9 [2022-11-18 19:33:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:12,219 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 3327 transitions. [2022-11-18 19:33:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 3327 transitions. [2022-11-18 19:33:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:12,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:12,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:12,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-18 19:33:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:12,421 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash 171758114, now seen corresponding path program 2 times [2022-11-18 19:33:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329654589] [2022-11-18 19:33:12,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:12,422 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:12,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:12,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:12,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:12,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:12,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:12,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:12,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:12,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329654589] [2022-11-18 19:33:12,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329654589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:12,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067591095] [2022-11-18 19:33:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:12,905 INFO L87 Difference]: Start difference. First operand 861 states and 3327 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:13,091 INFO L93 Difference]: Finished difference Result 869 states and 3353 transitions. [2022-11-18 19:33:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:13,095 INFO L225 Difference]: With dead ends: 869 [2022-11-18 19:33:13,095 INFO L226 Difference]: Without dead ends: 869 [2022-11-18 19:33:13,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:13,096 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:13,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-18 19:33:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-18 19:33:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-11-18 19:33:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.9079254079254078) internal successors, (3353), 868 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3353 transitions. [2022-11-18 19:33:13,111 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3353 transitions. Word has length 9 [2022-11-18 19:33:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:13,111 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 3353 transitions. [2022-11-18 19:33:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3353 transitions. [2022-11-18 19:33:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:13,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:13,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:13,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-18 19:33:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:13,313 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1764405049, now seen corresponding path program 1 times [2022-11-18 19:33:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652882741] [2022-11-18 19:33:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:13,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:13,315 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:13,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:33:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:13,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:13,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:13,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:14,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:14,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652882741] [2022-11-18 19:33:14,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652882741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:14,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:14,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:33:14,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009100976] [2022-11-18 19:33:14,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:14,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:33:14,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:33:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:33:14,344 INFO L87 Difference]: Start difference. First operand 869 states and 3353 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:14,812 INFO L93 Difference]: Finished difference Result 873 states and 3371 transitions. [2022-11-18 19:33:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:33:14,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:14,816 INFO L225 Difference]: With dead ends: 873 [2022-11-18 19:33:14,816 INFO L226 Difference]: Without dead ends: 873 [2022-11-18 19:33:14,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:33:14,817 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:14,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-11-18 19:33:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-18 19:33:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2022-11-18 19:33:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 3.910672853828306) internal successors, (3371), 872 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3371 transitions. [2022-11-18 19:33:14,839 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3371 transitions. Word has length 9 [2022-11-18 19:33:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:14,839 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 3371 transitions. [2022-11-18 19:33:14,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3371 transitions. [2022-11-18 19:33:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:14,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:14,840 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:14,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-18 19:33:15,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:15,041 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:15,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1192185991, now seen corresponding path program 1 times [2022-11-18 19:33:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:15,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571807279] [2022-11-18 19:33:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:15,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:15,044 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:15,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:15,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:15,313 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:15,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:15,382 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 [2022-11-18 19:33:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:15,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571807279] [2022-11-18 19:33:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571807279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:15,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 19:33:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131418891] [2022-11-18 19:33:15,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:33:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:33:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:33:15,919 INFO L87 Difference]: Start difference. First operand 873 states and 3371 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:18,238 INFO L93 Difference]: Finished difference Result 2474 states and 9309 transitions. [2022-11-18 19:33:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:33:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-11-18 19:33:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:18,244 INFO L225 Difference]: With dead ends: 2474 [2022-11-18 19:33:18,244 INFO L226 Difference]: Without dead ends: 2474 [2022-11-18 19:33:18,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-18 19:33:18,245 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 634 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:18,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 109 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 19:33:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-11-18 19:33:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1052. [2022-11-18 19:33:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1041 states have (on average 3.7790585975024014) internal successors, (3934), 1051 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3934 transitions. [2022-11-18 19:33:18,290 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3934 transitions. Word has length 9 [2022-11-18 19:33:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:18,290 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 3934 transitions. [2022-11-18 19:33:18,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3934 transitions. [2022-11-18 19:33:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 19:33:18,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:18,292 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:18,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-18 19:33:18,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:18,498 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1192186642, now seen corresponding path program 1 times [2022-11-18 19:33:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315831121] [2022-11-18 19:33:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:18,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:18,500 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:18,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:33:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:33:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:33:18,804 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-18 19:33:18,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-18 19:33:18,820 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 14 treesize of output 12 [2022-11-18 19:33:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:19,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:19,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315831121] [2022-11-18 19:33:19,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315831121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:19,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:19,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:33:19,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829357329] [2022-11-18 19:33:19,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:33:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:33:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:33:19,982 INFO L87 Difference]: Start difference. First operand 1052 states and 3934 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:20,985 INFO L93 Difference]: Finished difference Result 1632 states and 6091 transitions. [2022-11-18 19:33:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:33:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 19:33:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:20,990 INFO L225 Difference]: With dead ends: 1632 [2022-11-18 19:33:20,990 INFO L226 Difference]: Without dead ends: 1632 [2022-11-18 19:33:20,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:33:20,990 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 269 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:20,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2022-11-18 19:33:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-18 19:33:21,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1047. [2022-11-18 19:33:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1036 states have (on average 3.7886100386100385) internal successors, (3925), 1046 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3925 transitions. [2022-11-18 19:33:21,018 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3925 transitions. Word has length 9 [2022-11-18 19:33:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:21,018 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 3925 transitions. [2022-11-18 19:33:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3925 transitions. [2022-11-18 19:33:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:21,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:21,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:21,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:21,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:21,232 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 565768911, now seen corresponding path program 1 times [2022-11-18 19:33:21,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:21,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087027079] [2022-11-18 19:33:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:21,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:21,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:21,234 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:21,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:21,489 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:21,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:21,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:21,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087027079] [2022-11-18 19:33:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087027079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:21,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565302827] [2022-11-18 19:33:21,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:21,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:21,712 INFO L87 Difference]: Start difference. First operand 1047 states and 3925 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:21,871 INFO L93 Difference]: Finished difference Result 1054 states and 3951 transitions. [2022-11-18 19:33:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:21,874 INFO L225 Difference]: With dead ends: 1054 [2022-11-18 19:33:21,874 INFO L226 Difference]: Without dead ends: 1054 [2022-11-18 19:33:21,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:21,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:21,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-11-18 19:33:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1048. [2022-11-18 19:33:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1037 states have (on average 3.7878495660559306) internal successors, (3928), 1047 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3928 transitions. [2022-11-18 19:33:21,891 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3928 transitions. Word has length 10 [2022-11-18 19:33:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:21,891 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 3928 transitions. [2022-11-18 19:33:21,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3928 transitions. [2022-11-18 19:33:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:21,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:21,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:21,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:22,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:22,095 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 565606006, now seen corresponding path program 1 times [2022-11-18 19:33:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614267397] [2022-11-18 19:33:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:22,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:22,098 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:22,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:22,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:22,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:22,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:22,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:22,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614267397] [2022-11-18 19:33:22,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614267397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:22,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:22,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:22,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364758400] [2022-11-18 19:33:22,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:22,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:22,525 INFO L87 Difference]: Start difference. First operand 1048 states and 3928 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:22,697 INFO L93 Difference]: Finished difference Result 1049 states and 3930 transitions. [2022-11-18 19:33:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:22,700 INFO L225 Difference]: With dead ends: 1049 [2022-11-18 19:33:22,700 INFO L226 Difference]: Without dead ends: 1049 [2022-11-18 19:33:22,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:22,700 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:22,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-18 19:33:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-18 19:33:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2022-11-18 19:33:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1038 states have (on average 3.786127167630058) internal successors, (3930), 1048 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3930 transitions. [2022-11-18 19:33:22,723 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3930 transitions. Word has length 10 [2022-11-18 19:33:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:22,724 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 3930 transitions. [2022-11-18 19:33:22,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3930 transitions. [2022-11-18 19:33:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:22,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:22,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:22,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:22,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:22,937 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash 565606161, now seen corresponding path program 2 times [2022-11-18 19:33:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782471191] [2022-11-18 19:33:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:22,939 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:22,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:23,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:23,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:23,192 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:23,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:23,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:23,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782471191] [2022-11-18 19:33:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782471191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:23,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:23,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233183279] [2022-11-18 19:33:23,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:23,415 INFO L87 Difference]: Start difference. First operand 1049 states and 3930 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:23,568 INFO L93 Difference]: Finished difference Result 1124 states and 4209 transitions. [2022-11-18 19:33:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:23,572 INFO L225 Difference]: With dead ends: 1124 [2022-11-18 19:33:23,572 INFO L226 Difference]: Without dead ends: 1124 [2022-11-18 19:33:23,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:23,572 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:23,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-18 19:33:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-18 19:33:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1049. [2022-11-18 19:33:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1038 states have (on average 3.786127167630058) internal successors, (3930), 1048 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3930 transitions. [2022-11-18 19:33:23,591 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3930 transitions. Word has length 10 [2022-11-18 19:33:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:23,592 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 3930 transitions. [2022-11-18 19:33:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3930 transitions. [2022-11-18 19:33:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:23,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:23,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:23,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:23,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:23,793 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 761958487, now seen corresponding path program 1 times [2022-11-18 19:33:23,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:23,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234838077] [2022-11-18 19:33:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:23,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:23,795 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:23,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:33:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:24,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:24,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:24,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:24,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:24,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234838077] [2022-11-18 19:33:24,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234838077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:24,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:24,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730301796] [2022-11-18 19:33:24,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:24,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:24,234 INFO L87 Difference]: Start difference. First operand 1049 states and 3930 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:24,446 INFO L93 Difference]: Finished difference Result 1051 states and 3936 transitions. [2022-11-18 19:33:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:24,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:24,449 INFO L225 Difference]: With dead ends: 1051 [2022-11-18 19:33:24,449 INFO L226 Difference]: Without dead ends: 1051 [2022-11-18 19:33:24,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:24,450 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:24,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-18 19:33:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-11-18 19:33:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1051. [2022-11-18 19:33:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7846153846153845) internal successors, (3936), 1050 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3936 transitions. [2022-11-18 19:33:24,471 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3936 transitions. Word has length 10 [2022-11-18 19:33:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:24,471 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3936 transitions. [2022-11-18 19:33:24,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3936 transitions. [2022-11-18 19:33:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:24,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:24,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:24,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:24,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:24,675 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash 762047271, now seen corresponding path program 3 times [2022-11-18 19:33:24,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:24,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213171941] [2022-11-18 19:33:24,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:24,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:24,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:24,677 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:24,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:24,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:33:24,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:24,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:24,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:25,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:25,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213171941] [2022-11-18 19:33:25,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213171941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:25,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:25,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200441078] [2022-11-18 19:33:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:25,169 INFO L87 Difference]: Start difference. First operand 1051 states and 3936 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:25,314 INFO L93 Difference]: Finished difference Result 1057 states and 3959 transitions. [2022-11-18 19:33:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:25,317 INFO L225 Difference]: With dead ends: 1057 [2022-11-18 19:33:25,317 INFO L226 Difference]: Without dead ends: 1057 [2022-11-18 19:33:25,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:25,318 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:25,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:33:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-11-18 19:33:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1051. [2022-11-18 19:33:25,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7846153846153845) internal successors, (3936), 1050 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3936 transitions. [2022-11-18 19:33:25,335 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3936 transitions. Word has length 10 [2022-11-18 19:33:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:25,335 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3936 transitions. [2022-11-18 19:33:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3936 transitions. [2022-11-18 19:33:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:25,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:25,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:25,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-18 19:33:25,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:25,538 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:25,538 INFO L85 PathProgramCache]: Analyzing trace with hash 756979546, now seen corresponding path program 2 times [2022-11-18 19:33:25,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:25,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003679634] [2022-11-18 19:33:25,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:25,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:25,539 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:25,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:25,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:25,809 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:25,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:25,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:25,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:25,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003679634] [2022-11-18 19:33:25,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003679634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:25,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:25,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:25,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629634855] [2022-11-18 19:33:25,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:25,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:25,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:25,998 INFO L87 Difference]: Start difference. First operand 1051 states and 3936 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:26,174 INFO L93 Difference]: Finished difference Result 1051 states and 3935 transitions. [2022-11-18 19:33:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:26,177 INFO L225 Difference]: With dead ends: 1051 [2022-11-18 19:33:26,177 INFO L226 Difference]: Without dead ends: 1051 [2022-11-18 19:33:26,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:26,178 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:26,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-11-18 19:33:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1051. [2022-11-18 19:33:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7836538461538463) internal successors, (3935), 1050 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3935 transitions. [2022-11-18 19:33:26,195 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3935 transitions. Word has length 10 [2022-11-18 19:33:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:26,195 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3935 transitions. [2022-11-18 19:33:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3935 transitions. [2022-11-18 19:33:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:26,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:26,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:26,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-18 19:33:26,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:26,396 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash 756979701, now seen corresponding path program 4 times [2022-11-18 19:33:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:26,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917347738] [2022-11-18 19:33:26,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:33:26,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:26,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:26,398 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:26,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:33:26,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:26,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:26,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:26,667 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:26,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:26,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:26,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:26,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917347738] [2022-11-18 19:33:26,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917347738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:26,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:26,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230040817] [2022-11-18 19:33:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:26,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:26,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:26,893 INFO L87 Difference]: Start difference. First operand 1051 states and 3935 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:27,056 INFO L93 Difference]: Finished difference Result 1056 states and 3954 transitions. [2022-11-18 19:33:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:27,059 INFO L225 Difference]: With dead ends: 1056 [2022-11-18 19:33:27,059 INFO L226 Difference]: Without dead ends: 1056 [2022-11-18 19:33:27,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:27,060 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:27,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-18 19:33:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1051. [2022-11-18 19:33:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7836538461538463) internal successors, (3935), 1050 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3935 transitions. [2022-11-18 19:33:27,078 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3935 transitions. Word has length 10 [2022-11-18 19:33:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:27,078 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3935 transitions. [2022-11-18 19:33:27,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3935 transitions. [2022-11-18 19:33:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:27,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:27,079 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:27,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:27,280 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash 14500140, now seen corresponding path program 3 times [2022-11-18 19:33:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:27,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352470063] [2022-11-18 19:33:27,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:27,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:27,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:27,282 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:27,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:27,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:33:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:33:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:33:27,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:27,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:27,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352470063] [2022-11-18 19:33:27,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352470063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:27,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:27,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:27,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148043203] [2022-11-18 19:33:27,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:27,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:27,503 INFO L87 Difference]: Start difference. First operand 1051 states and 3935 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:27,867 INFO L93 Difference]: Finished difference Result 902 states and 3222 transitions. [2022-11-18 19:33:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:33:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:27,870 INFO L225 Difference]: With dead ends: 902 [2022-11-18 19:33:27,870 INFO L226 Difference]: Without dead ends: 902 [2022-11-18 19:33:27,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:27,870 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:33:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-18 19:33:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 869. [2022-11-18 19:33:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.6456876456876457) internal successors, (3128), 868 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3128 transitions. [2022-11-18 19:33:27,892 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3128 transitions. Word has length 10 [2022-11-18 19:33:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:27,892 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 3128 transitions. [2022-11-18 19:33:27,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3128 transitions. [2022-11-18 19:33:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:27,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:27,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:27,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:28,106 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1186717867, now seen corresponding path program 1 times [2022-11-18 19:33:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:28,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358144093] [2022-11-18 19:33:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:28,108 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:28,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:28,365 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:28,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:28,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:28,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:28,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358144093] [2022-11-18 19:33:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358144093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:28,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:28,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:28,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831643466] [2022-11-18 19:33:28,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:28,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:28,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:28,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:28,575 INFO L87 Difference]: Start difference. First operand 869 states and 3128 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:28,718 INFO L93 Difference]: Finished difference Result 881 states and 3178 transitions. [2022-11-18 19:33:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:28,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:28,721 INFO L225 Difference]: With dead ends: 881 [2022-11-18 19:33:28,721 INFO L226 Difference]: Without dead ends: 881 [2022-11-18 19:33:28,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:28,721 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:28,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:33:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-18 19:33:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 875. [2022-11-18 19:33:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 864 states have (on average 3.6481481481481484) internal successors, (3152), 874 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3152 transitions. [2022-11-18 19:33:28,744 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3152 transitions. Word has length 10 [2022-11-18 19:33:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:28,744 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 3152 transitions. [2022-11-18 19:33:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3152 transitions. [2022-11-18 19:33:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:28,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:28,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:28,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-18 19:33:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:28,955 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1186587171, now seen corresponding path program 1 times [2022-11-18 19:33:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363129600] [2022-11-18 19:33:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:28,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:28,957 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:28,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:29,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:29,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:29,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:29,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363129600] [2022-11-18 19:33:29,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363129600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:29,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:29,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137018348] [2022-11-18 19:33:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:29,416 INFO L87 Difference]: Start difference. First operand 875 states and 3152 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:29,541 INFO L93 Difference]: Finished difference Result 891 states and 3246 transitions. [2022-11-18 19:33:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:29,544 INFO L225 Difference]: With dead ends: 891 [2022-11-18 19:33:29,544 INFO L226 Difference]: Without dead ends: 891 [2022-11-18 19:33:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:29,544 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:29,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:33:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-18 19:33:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 881. [2022-11-18 19:33:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 870 states have (on average 3.6666666666666665) internal successors, (3190), 880 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3190 transitions. [2022-11-18 19:33:29,571 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3190 transitions. Word has length 10 [2022-11-18 19:33:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:29,571 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 3190 transitions. [2022-11-18 19:33:29,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3190 transitions. [2022-11-18 19:33:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:29,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:29,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:29,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-18 19:33:29,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:29,783 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1186580227, now seen corresponding path program 2 times [2022-11-18 19:33:29,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506186821] [2022-11-18 19:33:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:29,785 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:29,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:29,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:29,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:29,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:30,051 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:30,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:30,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:30,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:30,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506186821] [2022-11-18 19:33:30,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506186821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:30,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:30,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704479183] [2022-11-18 19:33:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:30,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:30,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:30,282 INFO L87 Difference]: Start difference. First operand 881 states and 3190 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:30,429 INFO L93 Difference]: Finished difference Result 887 states and 3210 transitions. [2022-11-18 19:33:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:30,432 INFO L225 Difference]: With dead ends: 887 [2022-11-18 19:33:30,432 INFO L226 Difference]: Without dead ends: 887 [2022-11-18 19:33:30,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:30,432 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:30,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-18 19:33:30,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 877. [2022-11-18 19:33:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 866 states have (on average 3.6605080831408774) internal successors, (3170), 876 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:30,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3170 transitions. [2022-11-18 19:33:30,456 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3170 transitions. Word has length 10 [2022-11-18 19:33:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:30,456 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 3170 transitions. [2022-11-18 19:33:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3170 transitions. [2022-11-18 19:33:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:30,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:30,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:30,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:30,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:30,659 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1186580909, now seen corresponding path program 1 times [2022-11-18 19:33:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776621727] [2022-11-18 19:33:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:30,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:30,661 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:30,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:33:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:30,937 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:31,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:31,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:31,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776621727] [2022-11-18 19:33:31,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776621727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:31,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:31,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001149604] [2022-11-18 19:33:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:31,125 INFO L87 Difference]: Start difference. First operand 877 states and 3170 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:31,300 INFO L93 Difference]: Finished difference Result 879 states and 3176 transitions. [2022-11-18 19:33:31,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:31,303 INFO L225 Difference]: With dead ends: 879 [2022-11-18 19:33:31,303 INFO L226 Difference]: Without dead ends: 879 [2022-11-18 19:33:31,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:31,304 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:31,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-18 19:33:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-18 19:33:31,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-11-18 19:33:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 868 states have (on average 3.6589861751152073) internal successors, (3176), 878 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 3176 transitions. [2022-11-18 19:33:31,319 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 3176 transitions. Word has length 10 [2022-11-18 19:33:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:31,319 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 3176 transitions. [2022-11-18 19:33:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 3176 transitions. [2022-11-18 19:33:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:31,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:31,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:31,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-18 19:33:31,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:31,531 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1186576011, now seen corresponding path program 2 times [2022-11-18 19:33:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691776870] [2022-11-18 19:33:31,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:31,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:31,532 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:31,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-18 19:33:31,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:31,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:31,805 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:31,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:32,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:32,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691776870] [2022-11-18 19:33:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691776870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:32,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:32,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089214622] [2022-11-18 19:33:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:32,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:32,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:32,015 INFO L87 Difference]: Start difference. First operand 879 states and 3176 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:32,167 INFO L93 Difference]: Finished difference Result 883 states and 3186 transitions. [2022-11-18 19:33:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:32,170 INFO L225 Difference]: With dead ends: 883 [2022-11-18 19:33:32,170 INFO L226 Difference]: Without dead ends: 883 [2022-11-18 19:33:32,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:32,171 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:32,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-18 19:33:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-18 19:33:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 873. [2022-11-18 19:33:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 3.6357308584686776) internal successors, (3134), 872 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3134 transitions. [2022-11-18 19:33:32,191 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3134 transitions. Word has length 10 [2022-11-18 19:33:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:32,192 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 3134 transitions. [2022-11-18 19:33:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3134 transitions. [2022-11-18 19:33:32,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:32,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:32,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:32,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:32,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:32,404 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1185802499, now seen corresponding path program 2 times [2022-11-18 19:33:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:32,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811994376] [2022-11-18 19:33:32,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:32,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:32,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:32,406 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-18 19:33:32,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:32,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:32,710 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:32,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:32,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:32,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811994376] [2022-11-18 19:33:32,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811994376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:32,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:32,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159938833] [2022-11-18 19:33:32,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:32,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:32,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:32,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:32,884 INFO L87 Difference]: Start difference. First operand 873 states and 3134 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:33,082 INFO L93 Difference]: Finished difference Result 865 states and 3094 transitions. [2022-11-18 19:33:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:33,084 INFO L225 Difference]: With dead ends: 865 [2022-11-18 19:33:33,084 INFO L226 Difference]: Without dead ends: 865 [2022-11-18 19:33:33,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:33,085 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:33,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-18 19:33:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-18 19:33:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-18 19:33:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 854 states have (on average 3.622950819672131) internal successors, (3094), 864 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3094 transitions. [2022-11-18 19:33:33,099 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3094 transitions. Word has length 10 [2022-11-18 19:33:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:33,099 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 3094 transitions. [2022-11-18 19:33:33,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3094 transitions. [2022-11-18 19:33:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:33,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:33,100 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:33,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:33,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:33,301 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 588705760, now seen corresponding path program 1 times [2022-11-18 19:33:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:33,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753930318] [2022-11-18 19:33:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:33,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:33,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:33,303 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:33,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-18 19:33:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:33:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:33,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:33,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:33,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:35,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753930318] [2022-11-18 19:33:35,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753930318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:35,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:35,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:33:35,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933757225] [2022-11-18 19:33:35,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:35,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:33:35,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:35,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:33:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:33:35,248 INFO L87 Difference]: Start difference. First operand 865 states and 3094 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:40,922 INFO L93 Difference]: Finished difference Result 1265 states and 4557 transitions. [2022-11-18 19:33:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:33:40,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:40,926 INFO L225 Difference]: With dead ends: 1265 [2022-11-18 19:33:40,926 INFO L226 Difference]: Without dead ends: 1265 [2022-11-18 19:33:40,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:33:40,927 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:40,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 123 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 729 Invalid, 0 Unknown, 139 Unchecked, 4.5s Time] [2022-11-18 19:33:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-18 19:33:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 944. [2022-11-18 19:33:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 933 states have (on average 3.620578778135048) internal successors, (3378), 943 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3378 transitions. [2022-11-18 19:33:40,943 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3378 transitions. Word has length 10 [2022-11-18 19:33:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:40,943 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 3378 transitions. [2022-11-18 19:33:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3378 transitions. [2022-11-18 19:33:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:40,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:40,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:40,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-18 19:33:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:41,144 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1143092364, now seen corresponding path program 1 times [2022-11-18 19:33:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003966815] [2022-11-18 19:33:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:41,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:41,146 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:41,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-18 19:33:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:41,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:33:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:41,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:41,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:41,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:42,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003966815] [2022-11-18 19:33:42,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003966815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:42,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:42,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:33:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988019350] [2022-11-18 19:33:42,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:42,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:33:42,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:33:42,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:33:42,589 INFO L87 Difference]: Start difference. First operand 944 states and 3378 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:45,377 INFO L93 Difference]: Finished difference Result 2124 states and 7946 transitions. [2022-11-18 19:33:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:33:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:45,383 INFO L225 Difference]: With dead ends: 2124 [2022-11-18 19:33:45,383 INFO L226 Difference]: Without dead ends: 2124 [2022-11-18 19:33:45,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:33:45,383 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 246 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:45,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 40 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 0 Unknown, 105 Unchecked, 1.3s Time] [2022-11-18 19:33:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-11-18 19:33:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1626. [2022-11-18 19:33:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1615 states have (on average 3.8142414860681115) internal successors, (6160), 1625 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 6160 transitions. [2022-11-18 19:33:45,412 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 6160 transitions. Word has length 10 [2022-11-18 19:33:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:45,412 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 6160 transitions. [2022-11-18 19:33:45,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 6160 transitions. [2022-11-18 19:33:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:45,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:45,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:45,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:45,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:45,625 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1143071318, now seen corresponding path program 1 times [2022-11-18 19:33:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:45,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137285212] [2022-11-18 19:33:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:45,627 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:45,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-18 19:33:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:33:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:45,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:46,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:46,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:46,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137285212] [2022-11-18 19:33:46,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137285212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:46,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:46,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:33:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867567526] [2022-11-18 19:33:46,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:33:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:33:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:33:46,704 INFO L87 Difference]: Start difference. First operand 1626 states and 6160 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:47,153 INFO L93 Difference]: Finished difference Result 1667 states and 6334 transitions. [2022-11-18 19:33:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:33:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:47,157 INFO L225 Difference]: With dead ends: 1667 [2022-11-18 19:33:47,157 INFO L226 Difference]: Without dead ends: 1667 [2022-11-18 19:33:47,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:33:47,158 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:47,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-18 19:33:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-11-18 19:33:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1656. [2022-11-18 19:33:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1645 states have (on average 3.817629179331307) internal successors, (6280), 1655 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6280 transitions. [2022-11-18 19:33:47,199 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6280 transitions. Word has length 10 [2022-11-18 19:33:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:47,199 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 6280 transitions. [2022-11-18 19:33:47,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6280 transitions. [2022-11-18 19:33:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:47,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:47,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:47,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:47,400 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1138021418, now seen corresponding path program 2 times [2022-11-18 19:33:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:47,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143346140] [2022-11-18 19:33:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:47,402 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:47,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-18 19:33:47,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:33:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:47,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:47,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:47,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:48,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143346140] [2022-11-18 19:33:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143346140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:48,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:33:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001639223] [2022-11-18 19:33:48,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:33:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:33:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:33:48,447 INFO L87 Difference]: Start difference. First operand 1656 states and 6280 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:49,207 INFO L93 Difference]: Finished difference Result 1857 states and 7204 transitions. [2022-11-18 19:33:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:33:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:49,212 INFO L225 Difference]: With dead ends: 1857 [2022-11-18 19:33:49,212 INFO L226 Difference]: Without dead ends: 1857 [2022-11-18 19:33:49,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:33:49,213 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:49,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 63 Unchecked, 0.7s Time] [2022-11-18 19:33:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-18 19:33:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1796. [2022-11-18 19:33:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1785 states have (on average 3.876750700280112) internal successors, (6920), 1795 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6920 transitions. [2022-11-18 19:33:49,262 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6920 transitions. Word has length 10 [2022-11-18 19:33:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:49,262 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 6920 transitions. [2022-11-18 19:33:49,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6920 transitions. [2022-11-18 19:33:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:49,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:49,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:49,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:49,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:49,471 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1138026068, now seen corresponding path program 3 times [2022-11-18 19:33:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949247492] [2022-11-18 19:33:49,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:49,473 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:49,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-18 19:33:49,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:33:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:33:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:49,785 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:49,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:50,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:33:50,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949247492] [2022-11-18 19:33:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949247492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:50,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:33:50,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:33:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87025103] [2022-11-18 19:33:50,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:33:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:33:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:33:50,514 INFO L87 Difference]: Start difference. First operand 1796 states and 6920 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:51,176 INFO L93 Difference]: Finished difference Result 1947 states and 7604 transitions. [2022-11-18 19:33:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:33:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 19:33:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:51,181 INFO L225 Difference]: With dead ends: 1947 [2022-11-18 19:33:51,181 INFO L226 Difference]: Without dead ends: 1947 [2022-11-18 19:33:51,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:33:51,182 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:51,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 25 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-11-18 19:33:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-18 19:33:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1807. [2022-11-18 19:33:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1796 states have (on average 3.8775055679287305) internal successors, (6964), 1806 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6964 transitions. [2022-11-18 19:33:51,231 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6964 transitions. Word has length 10 [2022-11-18 19:33:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:51,231 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 6964 transitions. [2022-11-18 19:33:51,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6964 transitions. [2022-11-18 19:33:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:51,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:51,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:51,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:51,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:51,447 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 358990668, now seen corresponding path program 1 times [2022-11-18 19:33:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:51,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017685974] [2022-11-18 19:33:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:51,449 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:51,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-18 19:33:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:51,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:51,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:52,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:52,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:52,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017685974] [2022-11-18 19:33:52,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017685974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:52,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:52,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332624564] [2022-11-18 19:33:52,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:52,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:52,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:52,003 INFO L87 Difference]: Start difference. First operand 1807 states and 6964 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:52,172 INFO L93 Difference]: Finished difference Result 1812 states and 6983 transitions. [2022-11-18 19:33:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:52,178 INFO L225 Difference]: With dead ends: 1812 [2022-11-18 19:33:52,178 INFO L226 Difference]: Without dead ends: 1812 [2022-11-18 19:33:52,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:52,179 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:52,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:33:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-18 19:33:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1808. [2022-11-18 19:33:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1797 states have (on average 3.877573734001113) internal successors, (6968), 1807 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6968 transitions. [2022-11-18 19:33:52,224 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6968 transitions. Word has length 11 [2022-11-18 19:33:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:52,224 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 6968 transitions. [2022-11-18 19:33:52,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:52,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6968 transitions. [2022-11-18 19:33:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:52,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:52,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:52,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-18 19:33:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:52,427 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 358969991, now seen corresponding path program 1 times [2022-11-18 19:33:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572946503] [2022-11-18 19:33:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:52,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:52,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:52,435 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:52,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-18 19:33:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:52,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:52,746 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:52,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:52,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:52,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572946503] [2022-11-18 19:33:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572946503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:52,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:52,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808992003] [2022-11-18 19:33:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:52,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:52,918 INFO L87 Difference]: Start difference. First operand 1808 states and 6968 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:53,133 INFO L93 Difference]: Finished difference Result 1809 states and 6970 transitions. [2022-11-18 19:33:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:53,141 INFO L225 Difference]: With dead ends: 1809 [2022-11-18 19:33:53,142 INFO L226 Difference]: Without dead ends: 1809 [2022-11-18 19:33:53,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:53,142 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:53,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-18 19:33:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-11-18 19:33:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1809. [2022-11-18 19:33:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.8765294771968852) internal successors, (6970), 1808 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6970 transitions. [2022-11-18 19:33:53,241 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6970 transitions. Word has length 11 [2022-11-18 19:33:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:53,241 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6970 transitions. [2022-11-18 19:33:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6970 transitions. [2022-11-18 19:33:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:53,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:53,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:53,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:53,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:53,448 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 358965558, now seen corresponding path program 2 times [2022-11-18 19:33:53,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521709297] [2022-11-18 19:33:53,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:53,451 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:53,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-18 19:33:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:53,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:53,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:53,970 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521709297] [2022-11-18 19:33:53,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521709297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:53,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:53,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343989977] [2022-11-18 19:33:53,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:53,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:53,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:53,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:53,972 INFO L87 Difference]: Start difference. First operand 1809 states and 6970 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:54,127 INFO L93 Difference]: Finished difference Result 1821 states and 7029 transitions. [2022-11-18 19:33:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:54,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:54,132 INFO L225 Difference]: With dead ends: 1821 [2022-11-18 19:33:54,132 INFO L226 Difference]: Without dead ends: 1821 [2022-11-18 19:33:54,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:54,132 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:54,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-18 19:33:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-11-18 19:33:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1809. [2022-11-18 19:33:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.8765294771968852) internal successors, (6970), 1808 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6970 transitions. [2022-11-18 19:33:54,172 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6970 transitions. Word has length 11 [2022-11-18 19:33:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:54,173 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6970 transitions. [2022-11-18 19:33:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6970 transitions. [2022-11-18 19:33:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:54,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:54,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:54,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:54,386 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 353924741, now seen corresponding path program 2 times [2022-11-18 19:33:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87384932] [2022-11-18 19:33:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:54,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:54,388 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:54,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-18 19:33:54,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:54,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:54,707 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:54,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:54,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:54,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87384932] [2022-11-18 19:33:54,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87384932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:54,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:54,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879934066] [2022-11-18 19:33:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:54,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:54,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:54,916 INFO L87 Difference]: Start difference. First operand 1809 states and 6970 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:55,147 INFO L93 Difference]: Finished difference Result 1810 states and 6972 transitions. [2022-11-18 19:33:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:55,153 INFO L225 Difference]: With dead ends: 1810 [2022-11-18 19:33:55,153 INFO L226 Difference]: Without dead ends: 1810 [2022-11-18 19:33:55,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:55,153 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:55,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-18 19:33:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-18 19:33:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1809. [2022-11-18 19:33:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-18 19:33:55,185 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-18 19:33:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:55,186 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-18 19:33:55,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-18 19:33:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:55,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:55,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:55,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:55,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:55,399 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2145676784, now seen corresponding path program 3 times [2022-11-18 19:33:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:55,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858448280] [2022-11-18 19:33:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:55,400 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-18 19:33:55,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:33:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:55,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:55,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:55,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:55,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:55,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858448280] [2022-11-18 19:33:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858448280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:55,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:55,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:55,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887819172] [2022-11-18 19:33:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:55,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:55,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:55,920 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:56,068 INFO L93 Difference]: Finished difference Result 1814 states and 6989 transitions. [2022-11-18 19:33:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:56,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:56,073 INFO L225 Difference]: With dead ends: 1814 [2022-11-18 19:33:56,073 INFO L226 Difference]: Without dead ends: 1814 [2022-11-18 19:33:56,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:56,074 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:56,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:33:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-11-18 19:33:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1809. [2022-11-18 19:33:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-18 19:33:56,101 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-18 19:33:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:56,102 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-18 19:33:56,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-18 19:33:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:56,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:56,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:56,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-18 19:33:56,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:56,311 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2146335441, now seen corresponding path program 3 times [2022-11-18 19:33:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:56,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694212425] [2022-11-18 19:33:56,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:56,319 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:56,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-18 19:33:56,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:33:56,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:56,694 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:56,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:56,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:56,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:56,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694212425] [2022-11-18 19:33:56,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694212425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:56,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:56,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803118541] [2022-11-18 19:33:56,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:56,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:56,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:56,886 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:57,084 INFO L93 Difference]: Finished difference Result 1811 states and 6974 transitions. [2022-11-18 19:33:57,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:57,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:57,089 INFO L225 Difference]: With dead ends: 1811 [2022-11-18 19:33:57,089 INFO L226 Difference]: Without dead ends: 1811 [2022-11-18 19:33:57,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:57,089 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:57,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-18 19:33:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-11-18 19:33:57,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1810. [2022-11-18 19:33:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1799 states have (on average 3.8749305169538633) internal successors, (6971), 1809 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6971 transitions. [2022-11-18 19:33:57,121 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6971 transitions. Word has length 11 [2022-11-18 19:33:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:57,121 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 6971 transitions. [2022-11-18 19:33:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6971 transitions. [2022-11-18 19:33:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:57,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:57,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:57,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-18 19:33:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:57,325 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2146339874, now seen corresponding path program 4 times [2022-11-18 19:33:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:57,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057813617] [2022-11-18 19:33:57,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:33:57,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:57,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:57,327 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:57,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-18 19:33:57,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:33:57,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:57,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:57,618 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:57,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:57,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:57,877 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057813617] [2022-11-18 19:33:57,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057813617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:57,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:57,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:57,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279782772] [2022-11-18 19:33:57,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:57,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:57,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:57,879 INFO L87 Difference]: Start difference. First operand 1810 states and 6971 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:58,060 INFO L93 Difference]: Finished difference Result 1883 states and 7295 transitions. [2022-11-18 19:33:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:58,066 INFO L225 Difference]: With dead ends: 1883 [2022-11-18 19:33:58,066 INFO L226 Difference]: Without dead ends: 1883 [2022-11-18 19:33:58,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:58,067 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:58,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-18 19:33:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-11-18 19:33:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1809. [2022-11-18 19:33:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-18 19:33:58,151 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-18 19:33:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:58,151 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-18 19:33:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-18 19:33:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:58,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:58,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:58,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:58,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:58,354 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1991537185, now seen corresponding path program 4 times [2022-11-18 19:33:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:58,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598416855] [2022-11-18 19:33:58,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:33:58,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:58,356 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:58,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-18 19:33:58,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:33:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:58,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:58,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:58,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:58,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:58,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:58,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598416855] [2022-11-18 19:33:58,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598416855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:58,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:58,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:33:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045441707] [2022-11-18 19:33:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:58,864 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:59,059 INFO L93 Difference]: Finished difference Result 1807 states and 6963 transitions. [2022-11-18 19:33:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:59,064 INFO L225 Difference]: With dead ends: 1807 [2022-11-18 19:33:59,064 INFO L226 Difference]: Without dead ends: 1807 [2022-11-18 19:33:59,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:33:59,064 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:59,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-18 19:33:59,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-11-18 19:33:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2022-11-18 19:33:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1796 states have (on average 3.8769487750556793) internal successors, (6963), 1806 states have internal predecessors, (6963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6963 transitions. [2022-11-18 19:33:59,096 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6963 transitions. Word has length 11 [2022-11-18 19:33:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:59,096 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 6963 transitions. [2022-11-18 19:33:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6963 transitions. [2022-11-18 19:33:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:33:59,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:59,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:59,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:59,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:59,310 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:33:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1991532752, now seen corresponding path program 5 times [2022-11-18 19:33:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:33:59,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847911059] [2022-11-18 19:33:59,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:33:59,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:33:59,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:33:59,312 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:33:59,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-18 19:33:59,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:33:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:33:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:59,612 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:33:59,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:33:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:59,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:59,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:33:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847911059] [2022-11-18 19:33:59,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847911059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:59,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:59,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:33:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155946861] [2022-11-18 19:33:59,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:33:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:33:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:33:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:33:59,842 INFO L87 Difference]: Start difference. First operand 1807 states and 6963 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:59,996 INFO L93 Difference]: Finished difference Result 1818 states and 7017 transitions. [2022-11-18 19:33:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:33:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:00,001 INFO L225 Difference]: With dead ends: 1818 [2022-11-18 19:34:00,001 INFO L226 Difference]: Without dead ends: 1818 [2022-11-18 19:34:00,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:00,002 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:00,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-18 19:34:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-11-18 19:34:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1806. [2022-11-18 19:34:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1795 states have (on average 3.8779944289693593) internal successors, (6961), 1805 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 6961 transitions. [2022-11-18 19:34:00,035 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 6961 transitions. Word has length 11 [2022-11-18 19:34:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:00,035 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 6961 transitions. [2022-11-18 19:34:00,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 6961 transitions. [2022-11-18 19:34:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:00,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:00,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:00,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:00,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:00,237 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:00,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1866442591, now seen corresponding path program 1 times [2022-11-18 19:34:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:00,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420593245] [2022-11-18 19:34:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:00,238 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:00,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-18 19:34:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:00,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:00,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:00,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:00,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420593245] [2022-11-18 19:34:00,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420593245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:00,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:00,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989982570] [2022-11-18 19:34:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:00,769 INFO L87 Difference]: Start difference. First operand 1806 states and 6961 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:00,904 INFO L93 Difference]: Finished difference Result 1860 states and 7251 transitions. [2022-11-18 19:34:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:00,909 INFO L225 Difference]: With dead ends: 1860 [2022-11-18 19:34:00,909 INFO L226 Difference]: Without dead ends: 1860 [2022-11-18 19:34:00,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:00,910 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:00,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:34:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-18 19:34:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1818. [2022-11-18 19:34:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1807 states have (on average 3.8871057000553404) internal successors, (7024), 1817 states have internal predecessors, (7024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 7024 transitions. [2022-11-18 19:34:00,939 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 7024 transitions. Word has length 11 [2022-11-18 19:34:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 7024 transitions. [2022-11-18 19:34:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 7024 transitions. [2022-11-18 19:34:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:00,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:00,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:00,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-18 19:34:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:01,140 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1866448853, now seen corresponding path program 1 times [2022-11-18 19:34:01,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985325114] [2022-11-18 19:34:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:01,142 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:01,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-18 19:34:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:01,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:01,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:01,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:01,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985325114] [2022-11-18 19:34:01,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985325114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:01,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:01,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:34:01,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828628484] [2022-11-18 19:34:01,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:01,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:01,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:01,622 INFO L87 Difference]: Start difference. First operand 1818 states and 7024 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:01,804 INFO L93 Difference]: Finished difference Result 1824 states and 7046 transitions. [2022-11-18 19:34:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:01,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:01,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:01,809 INFO L225 Difference]: With dead ends: 1824 [2022-11-18 19:34:01,809 INFO L226 Difference]: Without dead ends: 1824 [2022-11-18 19:34:01,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:01,809 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:01,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-18 19:34:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-11-18 19:34:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1822. [2022-11-18 19:34:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1811 states have (on average 3.8851463279955825) internal successors, (7036), 1821 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 7036 transitions. [2022-11-18 19:34:01,836 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 7036 transitions. Word has length 11 [2022-11-18 19:34:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:01,837 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 7036 transitions. [2022-11-18 19:34:01,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 7036 transitions. [2022-11-18 19:34:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:01,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:01,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:01,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-18 19:34:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:02,038 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1866453751, now seen corresponding path program 2 times [2022-11-18 19:34:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:02,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522626378] [2022-11-18 19:34:02,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:02,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:02,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:02,040 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:02,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-18 19:34:02,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:34:02,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:02,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:02,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:02,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:02,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522626378] [2022-11-18 19:34:02,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522626378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:02,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:02,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505834376] [2022-11-18 19:34:02,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:02,553 INFO L87 Difference]: Start difference. First operand 1822 states and 7036 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:02,711 INFO L93 Difference]: Finished difference Result 1868 states and 7286 transitions. [2022-11-18 19:34:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:02,716 INFO L225 Difference]: With dead ends: 1868 [2022-11-18 19:34:02,716 INFO L226 Difference]: Without dead ends: 1868 [2022-11-18 19:34:02,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:02,716 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:02,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-18 19:34:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2022-11-18 19:34:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1830. [2022-11-18 19:34:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1819 states have (on average 3.88565145684442) internal successors, (7068), 1829 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 7068 transitions. [2022-11-18 19:34:02,798 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 7068 transitions. Word has length 11 [2022-11-18 19:34:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:02,799 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 7068 transitions. [2022-11-18 19:34:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 7068 transitions. [2022-11-18 19:34:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:02,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:02,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:02,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-18 19:34:03,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:03,001 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1870357705, now seen corresponding path program 1 times [2022-11-18 19:34:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:03,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193878702] [2022-11-18 19:34:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:03,003 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:03,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-18 19:34:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:03,308 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:03,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:03,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:03,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:03,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193878702] [2022-11-18 19:34:03,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193878702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:03,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:03,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:03,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191992410] [2022-11-18 19:34:03,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:03,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:03,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:03,572 INFO L87 Difference]: Start difference. First operand 1830 states and 7068 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:03,718 INFO L93 Difference]: Finished difference Result 1864 states and 7251 transitions. [2022-11-18 19:34:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:03,725 INFO L225 Difference]: With dead ends: 1864 [2022-11-18 19:34:03,725 INFO L226 Difference]: Without dead ends: 1864 [2022-11-18 19:34:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:03,726 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-18 19:34:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-11-18 19:34:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1837. [2022-11-18 19:34:03,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1826 states have (on average 3.886089813800657) internal successors, (7096), 1836 states have internal predecessors, (7096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 7096 transitions. [2022-11-18 19:34:03,762 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 7096 transitions. Word has length 11 [2022-11-18 19:34:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:03,762 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 7096 transitions. [2022-11-18 19:34:03,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 7096 transitions. [2022-11-18 19:34:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:03,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:03,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:03,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-18 19:34:03,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:03,964 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:03,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1870501111, now seen corresponding path program 3 times [2022-11-18 19:34:03,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:03,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644754021] [2022-11-18 19:34:03,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:03,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:03,966 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:03,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-18 19:34:04,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:34:04,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:04,256 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:04,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:04,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:04,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644754021] [2022-11-18 19:34:04,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644754021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:04,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:04,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133956264] [2022-11-18 19:34:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:04,514 INFO L87 Difference]: Start difference. First operand 1837 states and 7096 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:04,660 INFO L93 Difference]: Finished difference Result 1881 states and 7359 transitions. [2022-11-18 19:34:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:04,665 INFO L225 Difference]: With dead ends: 1881 [2022-11-18 19:34:04,665 INFO L226 Difference]: Without dead ends: 1881 [2022-11-18 19:34:04,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:04,665 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:04,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-18 19:34:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-18 19:34:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1851. [2022-11-18 19:34:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1840 states have (on average 3.9005434782608694) internal successors, (7177), 1850 states have internal predecessors, (7177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 7177 transitions. [2022-11-18 19:34:04,710 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 7177 transitions. Word has length 11 [2022-11-18 19:34:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:04,710 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 7177 transitions. [2022-11-18 19:34:04,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 7177 transitions. [2022-11-18 19:34:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:04,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:04,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:04,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:04,923 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1870500925, now seen corresponding path program 2 times [2022-11-18 19:34:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061148831] [2022-11-18 19:34:04,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:04,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:04,925 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:04,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-18 19:34:05,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:34:05,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:05,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:05,223 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:05,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:05,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:05,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061148831] [2022-11-18 19:34:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061148831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:05,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:05,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083193608] [2022-11-18 19:34:05,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:05,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:05,444 INFO L87 Difference]: Start difference. First operand 1851 states and 7177 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:05,581 INFO L93 Difference]: Finished difference Result 1881 states and 7307 transitions. [2022-11-18 19:34:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:05,586 INFO L225 Difference]: With dead ends: 1881 [2022-11-18 19:34:05,586 INFO L226 Difference]: Without dead ends: 1881 [2022-11-18 19:34:05,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:05,586 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:05,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-18 19:34:05,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-18 19:34:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1856. [2022-11-18 19:34:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1845 states have (on average 3.9008130081300814) internal successors, (7197), 1855 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 7197 transitions. [2022-11-18 19:34:05,619 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 7197 transitions. Word has length 11 [2022-11-18 19:34:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:05,619 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 7197 transitions. [2022-11-18 19:34:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 7197 transitions. [2022-11-18 19:34:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:05,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:05,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:05,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-18 19:34:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:05,823 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1870715693, now seen corresponding path program 2 times [2022-11-18 19:34:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:05,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997482872] [2022-11-18 19:34:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:05,825 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:05,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-18 19:34:06,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:06,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:06,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:06,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:06,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:06,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997482872] [2022-11-18 19:34:06,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997482872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:06,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:06,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:34:06,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130896209] [2022-11-18 19:34:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:06,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:06,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:06,361 INFO L87 Difference]: Start difference. First operand 1856 states and 7197 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:06,541 INFO L93 Difference]: Finished difference Result 1858 states and 7201 transitions. [2022-11-18 19:34:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:06,546 INFO L225 Difference]: With dead ends: 1858 [2022-11-18 19:34:06,546 INFO L226 Difference]: Without dead ends: 1858 [2022-11-18 19:34:06,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:06,546 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:06,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-18 19:34:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-11-18 19:34:06,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-11-18 19:34:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1845 states have (on average 3.899728997289973) internal successors, (7195), 1855 states have internal predecessors, (7195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 7195 transitions. [2022-11-18 19:34:06,581 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 7195 transitions. Word has length 11 [2022-11-18 19:34:06,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:06,581 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 7195 transitions. [2022-11-18 19:34:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 7195 transitions. [2022-11-18 19:34:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:06,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:06,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:06,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:06,783 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1870720591, now seen corresponding path program 4 times [2022-11-18 19:34:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431288707] [2022-11-18 19:34:06,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:34:06,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:06,785 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:06,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-18 19:34:06,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:34:06,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:06,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:07,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:07,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:07,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:07,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:07,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431288707] [2022-11-18 19:34:07,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431288707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:07,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:07,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:07,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792514209] [2022-11-18 19:34:07,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:07,311 INFO L87 Difference]: Start difference. First operand 1856 states and 7195 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:07,469 INFO L93 Difference]: Finished difference Result 1857 states and 7188 transitions. [2022-11-18 19:34:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:07,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:07,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:07,474 INFO L225 Difference]: With dead ends: 1857 [2022-11-18 19:34:07,475 INFO L226 Difference]: Without dead ends: 1857 [2022-11-18 19:34:07,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:07,475 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:07,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:34:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-18 19:34:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1832. [2022-11-18 19:34:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1821 states have (on average 3.885777045579352) internal successors, (7076), 1831 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7076 transitions. [2022-11-18 19:34:07,505 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7076 transitions. Word has length 11 [2022-11-18 19:34:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:07,506 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7076 transitions. [2022-11-18 19:34:07,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7076 transitions. [2022-11-18 19:34:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:07,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:07,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:07,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-18 19:34:07,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:07,707 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:07,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1870846885, now seen corresponding path program 3 times [2022-11-18 19:34:07,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582958216] [2022-11-18 19:34:07,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:07,708 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 [2022-11-18 19:34:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:07,709 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:07,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-18 19:34:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:34:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:08,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:08,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:08,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:08,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:08,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582958216] [2022-11-18 19:34:08,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582958216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:08,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:08,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194202284] [2022-11-18 19:34:08,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:08,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:08,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:08,251 INFO L87 Difference]: Start difference. First operand 1832 states and 7076 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:08,404 INFO L93 Difference]: Finished difference Result 1835 states and 7084 transitions. [2022-11-18 19:34:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:08,409 INFO L225 Difference]: With dead ends: 1835 [2022-11-18 19:34:08,409 INFO L226 Difference]: Without dead ends: 1835 [2022-11-18 19:34:08,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:08,410 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:08,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-18 19:34:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-11-18 19:34:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1820. [2022-11-18 19:34:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1809 states have (on average 3.876727473742399) internal successors, (7013), 1819 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 7013 transitions. [2022-11-18 19:34:08,452 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 7013 transitions. Word has length 11 [2022-11-18 19:34:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:08,452 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 7013 transitions. [2022-11-18 19:34:08,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 7013 transitions. [2022-11-18 19:34:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:08,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:08,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:08,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:08,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:08,665 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1894846403, now seen corresponding path program 3 times [2022-11-18 19:34:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868881262] [2022-11-18 19:34:08,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:08,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:08,666 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-18 19:34:08,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:34:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:08,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:09,052 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:09,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:09,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:09,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868881262] [2022-11-18 19:34:09,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868881262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:09,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:09,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:34:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323980063] [2022-11-18 19:34:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:09,242 INFO L87 Difference]: Start difference. First operand 1820 states and 7013 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:09,437 INFO L93 Difference]: Finished difference Result 1812 states and 6977 transitions. [2022-11-18 19:34:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:09,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:09,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:09,441 INFO L225 Difference]: With dead ends: 1812 [2022-11-18 19:34:09,442 INFO L226 Difference]: Without dead ends: 1812 [2022-11-18 19:34:09,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:09,442 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:09,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-18 19:34:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-18 19:34:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2022-11-18 19:34:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1801 states have (on average 3.8739589117157136) internal successors, (6977), 1811 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6977 transitions. [2022-11-18 19:34:09,469 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6977 transitions. Word has length 11 [2022-11-18 19:34:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:09,469 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 6977 transitions. [2022-11-18 19:34:09,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6977 transitions. [2022-11-18 19:34:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:09,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:09,470 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:09,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-18 19:34:09,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:09,671 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1060779082, now seen corresponding path program 1 times [2022-11-18 19:34:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:09,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401477682] [2022-11-18 19:34:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:09,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:09,672 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-18 19:34:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:34:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:10,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:10,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:11,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401477682] [2022-11-18 19:34:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401477682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:11,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:11,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:34:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158746432] [2022-11-18 19:34:11,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:34:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:34:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:34:11,693 INFO L87 Difference]: Start difference. First operand 1812 states and 6977 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:17,251 INFO L93 Difference]: Finished difference Result 2455 states and 9693 transitions. [2022-11-18 19:34:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:34:17,252 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:17,258 INFO L225 Difference]: With dead ends: 2455 [2022-11-18 19:34:17,258 INFO L226 Difference]: Without dead ends: 2455 [2022-11-18 19:34:17,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-18 19:34:17,258 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:17,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 117 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 124 Unchecked, 4.5s Time] [2022-11-18 19:34:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-11-18 19:34:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1961. [2022-11-18 19:34:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1950 states have (on average 4.015384615384615) internal successors, (7830), 1960 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 7830 transitions. [2022-11-18 19:34:17,306 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 7830 transitions. Word has length 11 [2022-11-18 19:34:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:17,307 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 7830 transitions. [2022-11-18 19:34:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 7830 transitions. [2022-11-18 19:34:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:17,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:17,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:17,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-18 19:34:17,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:17,508 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1056353679, now seen corresponding path program 1 times [2022-11-18 19:34:17,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:17,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928850781] [2022-11-18 19:34:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:17,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:17,510 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:17,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-18 19:34:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:34:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:17,848 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:17,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:18,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:18,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928850781] [2022-11-18 19:34:18,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928850781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:18,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:18,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743698310] [2022-11-18 19:34:18,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:18,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:18,688 INFO L87 Difference]: Start difference. First operand 1961 states and 7830 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:19,183 INFO L93 Difference]: Finished difference Result 2051 states and 8296 transitions. [2022-11-18 19:34:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:34:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:19,189 INFO L225 Difference]: With dead ends: 2051 [2022-11-18 19:34:19,189 INFO L226 Difference]: Without dead ends: 2051 [2022-11-18 19:34:19,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:19,189 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-18 19:34:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-18 19:34:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2029. [2022-11-18 19:34:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2018 states have (on average 4.046085232903865) internal successors, (8165), 2028 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 8165 transitions. [2022-11-18 19:34:19,221 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 8165 transitions. Word has length 11 [2022-11-18 19:34:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:19,221 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 8165 transitions. [2022-11-18 19:34:19,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 8165 transitions. [2022-11-18 19:34:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:19,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:19,222 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:19,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-18 19:34:19,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:19,423 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash 783722782, now seen corresponding path program 2 times [2022-11-18 19:34:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035916376] [2022-11-18 19:34:19,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:19,424 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:19,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-18 19:34:19,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:34:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:19,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:19,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:20,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:21,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:21,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035916376] [2022-11-18 19:34:21,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035916376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:21,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:21,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:34:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253987400] [2022-11-18 19:34:21,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:21,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:34:21,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:34:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:34:21,418 INFO L87 Difference]: Start difference. First operand 2029 states and 8165 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:32,282 INFO L93 Difference]: Finished difference Result 2982 states and 11483 transitions. [2022-11-18 19:34:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:34:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:32,291 INFO L225 Difference]: With dead ends: 2982 [2022-11-18 19:34:32,291 INFO L226 Difference]: Without dead ends: 2982 [2022-11-18 19:34:32,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2022-11-18 19:34:32,291 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 574 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:32,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 142 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-18 19:34:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-11-18 19:34:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1535. [2022-11-18 19:34:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1524 states have (on average 3.7992125984251968) internal successors, (5790), 1534 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5790 transitions. [2022-11-18 19:34:32,333 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5790 transitions. Word has length 11 [2022-11-18 19:34:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:32,334 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 5790 transitions. [2022-11-18 19:34:32,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5790 transitions. [2022-11-18 19:34:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:32,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:32,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:32,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-18 19:34:32,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:32,535 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:32,535 INFO L85 PathProgramCache]: Analyzing trace with hash 646533369, now seen corresponding path program 2 times [2022-11-18 19:34:32,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:32,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546948523] [2022-11-18 19:34:32,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:32,537 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:32,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-18 19:34:32,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:32,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:34:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:32,890 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:32,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:33,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:33,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546948523] [2022-11-18 19:34:33,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546948523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:33,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:33,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767071863] [2022-11-18 19:34:33,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:33,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:33,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:33,640 INFO L87 Difference]: Start difference. First operand 1535 states and 5790 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:34,207 INFO L93 Difference]: Finished difference Result 1569 states and 5952 transitions. [2022-11-18 19:34:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:34:34,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:34,211 INFO L225 Difference]: With dead ends: 1569 [2022-11-18 19:34:34,211 INFO L226 Difference]: Without dead ends: 1569 [2022-11-18 19:34:34,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:34,212 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:34,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-18 19:34:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-11-18 19:34:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1557. [2022-11-18 19:34:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1546 states have (on average 3.813712807244502) internal successors, (5896), 1556 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5896 transitions. [2022-11-18 19:34:34,235 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5896 transitions. Word has length 11 [2022-11-18 19:34:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:34,235 INFO L495 AbstractCegarLoop]: Abstraction has 1557 states and 5896 transitions. [2022-11-18 19:34:34,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5896 transitions. [2022-11-18 19:34:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:34,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:34,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:34,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:34,437 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash 646535229, now seen corresponding path program 3 times [2022-11-18 19:34:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:34,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430612418] [2022-11-18 19:34:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:34,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:34,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:34,439 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:34,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-18 19:34:34,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:34:34,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:34:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:34,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:34,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:35,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:35,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:35,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430612418] [2022-11-18 19:34:35,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430612418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:35,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408629940] [2022-11-18 19:34:35,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:35,560 INFO L87 Difference]: Start difference. First operand 1557 states and 5896 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:36,124 INFO L93 Difference]: Finished difference Result 1615 states and 6180 transitions. [2022-11-18 19:34:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:34:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:36,129 INFO L225 Difference]: With dead ends: 1615 [2022-11-18 19:34:36,129 INFO L226 Difference]: Without dead ends: 1615 [2022-11-18 19:34:36,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:36,130 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:36,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-18 19:34:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-11-18 19:34:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1582. [2022-11-18 19:34:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1571 states have (on average 3.8408656906429024) internal successors, (6034), 1581 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 6034 transitions. [2022-11-18 19:34:36,153 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 6034 transitions. Word has length 11 [2022-11-18 19:34:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:36,153 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 6034 transitions. [2022-11-18 19:34:36,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 6034 transitions. [2022-11-18 19:34:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:36,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:36,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:36,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-18 19:34:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:36,355 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1076116411, now seen corresponding path program 1 times [2022-11-18 19:34:36,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:36,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536862646] [2022-11-18 19:34:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:36,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:36,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:36,356 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:36,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-18 19:34:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:36,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:34:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:36,693 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:36,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:36,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:37,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:37,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536862646] [2022-11-18 19:34:37,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536862646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:37,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:37,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418307343] [2022-11-18 19:34:37,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:37,460 INFO L87 Difference]: Start difference. First operand 1582 states and 6034 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:37,930 INFO L93 Difference]: Finished difference Result 1623 states and 6239 transitions. [2022-11-18 19:34:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:34:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:37,935 INFO L225 Difference]: With dead ends: 1623 [2022-11-18 19:34:37,935 INFO L226 Difference]: Without dead ends: 1623 [2022-11-18 19:34:37,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:37,936 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:37,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-18 19:34:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-18 19:34:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1598. [2022-11-18 19:34:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1587 states have (on average 3.8525519848771266) internal successors, (6114), 1597 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 6114 transitions. [2022-11-18 19:34:37,966 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 6114 transitions. Word has length 11 [2022-11-18 19:34:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:37,966 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 6114 transitions. [2022-11-18 19:34:37,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 6114 transitions. [2022-11-18 19:34:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:37,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:37,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:37,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-18 19:34:38,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:38,168 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1075470991, now seen corresponding path program 2 times [2022-11-18 19:34:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185140229] [2022-11-18 19:34:38,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:38,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:38,170 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:38,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-18 19:34:38,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:38,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:34:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:38,528 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:38,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:38,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:39,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185140229] [2022-11-18 19:34:39,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185140229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:39,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:39,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:39,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262574564] [2022-11-18 19:34:39,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:39,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:39,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:39,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:39,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:39,291 INFO L87 Difference]: Start difference. First operand 1598 states and 6114 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:39,934 INFO L93 Difference]: Finished difference Result 1762 states and 6860 transitions. [2022-11-18 19:34:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:34:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:39,939 INFO L225 Difference]: With dead ends: 1762 [2022-11-18 19:34:39,939 INFO L226 Difference]: Without dead ends: 1762 [2022-11-18 19:34:39,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:39,939 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:39,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2022-11-18 19:34:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-18 19:34:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1590. [2022-11-18 19:34:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1579 states have (on average 3.851804939835339) internal successors, (6082), 1589 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 6082 transitions. [2022-11-18 19:34:39,963 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 6082 transitions. Word has length 11 [2022-11-18 19:34:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:39,964 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 6082 transitions. [2022-11-18 19:34:39,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 6082 transitions. [2022-11-18 19:34:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:39,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:39,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:39,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-18 19:34:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:40,165 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1075338001, now seen corresponding path program 3 times [2022-11-18 19:34:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:40,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336456542] [2022-11-18 19:34:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:40,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:40,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:40,167 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:40,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-18 19:34:40,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:34:40,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:34:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:40,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:40,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:40,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:41,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:41,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336456542] [2022-11-18 19:34:41,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336456542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:41,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:41,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561239659] [2022-11-18 19:34:41,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:41,254 INFO L87 Difference]: Start difference. First operand 1590 states and 6082 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:41,989 INFO L93 Difference]: Finished difference Result 1866 states and 7336 transitions. [2022-11-18 19:34:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:34:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:41,994 INFO L225 Difference]: With dead ends: 1866 [2022-11-18 19:34:41,994 INFO L226 Difference]: Without dead ends: 1866 [2022-11-18 19:34:41,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:41,995 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:41,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-18 19:34:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-11-18 19:34:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1642. [2022-11-18 19:34:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1631 states have (on average 3.8749233599019006) internal successors, (6320), 1641 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6320 transitions. [2022-11-18 19:34:42,023 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6320 transitions. Word has length 11 [2022-11-18 19:34:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:42,023 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 6320 transitions. [2022-11-18 19:34:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6320 transitions. [2022-11-18 19:34:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:42,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:42,024 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:42,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:42,224 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 918923719, now seen corresponding path program 2 times [2022-11-18 19:34:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:42,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709635061] [2022-11-18 19:34:42,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:42,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:42,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:42,236 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:42,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-18 19:34:42,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:42,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:34:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:42,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:42,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:42,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:43,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709635061] [2022-11-18 19:34:43,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709635061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:43,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:43,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-11-18 19:34:43,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819929092] [2022-11-18 19:34:43,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:34:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:34:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:34:43,757 INFO L87 Difference]: Start difference. First operand 1642 states and 6320 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2022-11-18 19:34:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:46,472 INFO L93 Difference]: Finished difference Result 1850 states and 6784 transitions. [2022-11-18 19:34:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:34:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 [2022-11-18 19:34:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:46,478 INFO L225 Difference]: With dead ends: 1850 [2022-11-18 19:34:46,478 INFO L226 Difference]: Without dead ends: 1850 [2022-11-18 19:34:46,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:34:46,478 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:46,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 149 Unchecked, 2.4s Time] [2022-11-18 19:34:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-11-18 19:34:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1673. [2022-11-18 19:34:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1662 states have (on average 3.884476534296029) internal successors, (6456), 1672 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 6456 transitions. [2022-11-18 19:34:46,509 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 6456 transitions. Word has length 11 [2022-11-18 19:34:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:46,509 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 6456 transitions. [2022-11-18 19:34:46,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2022-11-18 19:34:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 6456 transitions. [2022-11-18 19:34:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 19:34:46,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:46,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:46,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-18 19:34:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:46,711 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash 918935251, now seen corresponding path program 4 times [2022-11-18 19:34:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:46,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350655199] [2022-11-18 19:34:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:34:46,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:46,713 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:46,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-18 19:34:46,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:34:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:34:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:47,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:47,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:34:47,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350655199] [2022-11-18 19:34:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350655199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:47,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:34:47,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:34:47,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468787281] [2022-11-18 19:34:47,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:47,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:34:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:34:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:34:47,885 INFO L87 Difference]: Start difference. First operand 1673 states and 6456 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:48,730 INFO L93 Difference]: Finished difference Result 1983 states and 7863 transitions. [2022-11-18 19:34:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:34:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 19:34:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:48,736 INFO L225 Difference]: With dead ends: 1983 [2022-11-18 19:34:48,736 INFO L226 Difference]: Without dead ends: 1983 [2022-11-18 19:34:48,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:34:48,736 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:48,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2022-11-18 19:34:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-11-18 19:34:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1631. [2022-11-18 19:34:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1620 states have (on average 3.873456790123457) internal successors, (6275), 1630 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 6275 transitions. [2022-11-18 19:34:48,764 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 6275 transitions. Word has length 11 [2022-11-18 19:34:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:48,765 INFO L495 AbstractCegarLoop]: Abstraction has 1631 states and 6275 transitions. [2022-11-18 19:34:48,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 6275 transitions. [2022-11-18 19:34:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:48,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:48,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:48,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:48,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:48,967 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:48,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1756051288, now seen corresponding path program 1 times [2022-11-18 19:34:48,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:48,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014296096] [2022-11-18 19:34:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:48,968 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 [2022-11-18 19:34:48,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:48,969 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:48,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-18 19:34:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:49,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:49,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:49,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:49,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:49,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:49,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014296096] [2022-11-18 19:34:49,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014296096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:49,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727673296] [2022-11-18 19:34:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:49,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:49,536 INFO L87 Difference]: Start difference. First operand 1631 states and 6275 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:49,711 INFO L93 Difference]: Finished difference Result 1654 states and 6366 transitions. [2022-11-18 19:34:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:49,715 INFO L225 Difference]: With dead ends: 1654 [2022-11-18 19:34:49,716 INFO L226 Difference]: Without dead ends: 1654 [2022-11-18 19:34:49,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:49,716 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:49,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:34:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-11-18 19:34:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1632. [2022-11-18 19:34:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1621 states have (on average 3.873534855027761) internal successors, (6279), 1631 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 6279 transitions. [2022-11-18 19:34:49,740 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 6279 transitions. Word has length 12 [2022-11-18 19:34:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:49,741 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 6279 transitions. [2022-11-18 19:34:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 6279 transitions. [2022-11-18 19:34:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:49,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:49,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:49,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:49,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:49,954 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:49,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1756181984, now seen corresponding path program 1 times [2022-11-18 19:34:49,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:49,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990746103] [2022-11-18 19:34:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:49,955 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:49,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-18 19:34:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:50,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:50,285 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:50,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:50,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:50,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990746103] [2022-11-18 19:34:50,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990746103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:50,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:50,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:50,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63645744] [2022-11-18 19:34:50,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:50,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:50,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:50,537 INFO L87 Difference]: Start difference. First operand 1632 states and 6279 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:50,675 INFO L93 Difference]: Finished difference Result 1657 states and 6404 transitions. [2022-11-18 19:34:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:50,679 INFO L225 Difference]: With dead ends: 1657 [2022-11-18 19:34:50,679 INFO L226 Difference]: Without dead ends: 1657 [2022-11-18 19:34:50,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:50,679 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:50,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:34:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-11-18 19:34:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1633. [2022-11-18 19:34:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1622 states have (on average 3.873612823674476) internal successors, (6283), 1632 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 6283 transitions. [2022-11-18 19:34:50,704 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 6283 transitions. Word has length 12 [2022-11-18 19:34:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:50,704 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 6283 transitions. [2022-11-18 19:34:50,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 6283 transitions. [2022-11-18 19:34:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:50,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:50,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:50,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:50,906 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1756188928, now seen corresponding path program 2 times [2022-11-18 19:34:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:50,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300933650] [2022-11-18 19:34:50,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:50,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:50,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:50,907 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:50,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-18 19:34:51,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:34:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:51,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:51,228 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:51,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:51,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300933650] [2022-11-18 19:34:51,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300933650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:51,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:51,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151975158] [2022-11-18 19:34:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:51,515 INFO L87 Difference]: Start difference. First operand 1633 states and 6283 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:51,682 INFO L93 Difference]: Finished difference Result 1655 states and 6370 transitions. [2022-11-18 19:34:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:51,686 INFO L225 Difference]: With dead ends: 1655 [2022-11-18 19:34:51,687 INFO L226 Difference]: Without dead ends: 1655 [2022-11-18 19:34:51,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:51,687 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:51,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-18 19:34:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-18 19:34:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1634. [2022-11-18 19:34:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1623 states have (on average 3.873690696241528) internal successors, (6287), 1633 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 6287 transitions. [2022-11-18 19:34:51,716 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 6287 transitions. Word has length 12 [2022-11-18 19:34:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:51,716 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 6287 transitions. [2022-11-18 19:34:51,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 6287 transitions. [2022-11-18 19:34:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:51,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:51,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:51,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:51,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:51,920 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1756188246, now seen corresponding path program 1 times [2022-11-18 19:34:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:51,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31000161] [2022-11-18 19:34:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:51,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:51,921 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:51,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-18 19:34:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:52,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:52,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:52,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:52,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:52,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31000161] [2022-11-18 19:34:52,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31000161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:52,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:52,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:34:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392167000] [2022-11-18 19:34:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:52,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:52,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:52,444 INFO L87 Difference]: Start difference. First operand 1634 states and 6287 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:52,649 INFO L93 Difference]: Finished difference Result 1638 states and 6302 transitions. [2022-11-18 19:34:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:52,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:52,656 INFO L225 Difference]: With dead ends: 1638 [2022-11-18 19:34:52,656 INFO L226 Difference]: Without dead ends: 1638 [2022-11-18 19:34:52,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:52,656 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:52,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-18 19:34:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-11-18 19:34:52,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1635. [2022-11-18 19:34:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1624 states have (on average 3.872536945812808) internal successors, (6289), 1634 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6289 transitions. [2022-11-18 19:34:52,694 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6289 transitions. Word has length 12 [2022-11-18 19:34:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:52,695 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 6289 transitions. [2022-11-18 19:34:52,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6289 transitions. [2022-11-18 19:34:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:52,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:52,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:52,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:52,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:52,907 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1756193144, now seen corresponding path program 2 times [2022-11-18 19:34:52,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270617503] [2022-11-18 19:34:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:52,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:52,909 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:52,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-18 19:34:53,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:34:53,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:53,250 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:53,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:53,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:53,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270617503] [2022-11-18 19:34:53,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270617503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:53,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:53,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:53,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728328083] [2022-11-18 19:34:53,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:53,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:53,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:53,532 INFO L87 Difference]: Start difference. First operand 1635 states and 6289 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:53,687 INFO L93 Difference]: Finished difference Result 1651 states and 6361 transitions. [2022-11-18 19:34:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:53,692 INFO L225 Difference]: With dead ends: 1651 [2022-11-18 19:34:53,692 INFO L226 Difference]: Without dead ends: 1651 [2022-11-18 19:34:53,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:53,692 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:53,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-18 19:34:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-11-18 19:34:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1634. [2022-11-18 19:34:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1623 states have (on average 3.8724584103512014) internal successors, (6285), 1633 states have internal predecessors, (6285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 6285 transitions. [2022-11-18 19:34:53,717 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 6285 transitions. Word has length 12 [2022-11-18 19:34:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:53,717 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 6285 transitions. [2022-11-18 19:34:53,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:53,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 6285 transitions. [2022-11-18 19:34:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:53,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:53,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:53,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-18 19:34:53,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:53,918 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1756967338, now seen corresponding path program 3 times [2022-11-18 19:34:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:53,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324704690] [2022-11-18 19:34:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:53,920 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:53,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-18 19:34:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:34:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:54,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:54,251 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:54,252 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:54,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:54,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:54,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324704690] [2022-11-18 19:34:54,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324704690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:54,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:54,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:54,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570652302] [2022-11-18 19:34:54,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:54,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:54,502 INFO L87 Difference]: Start difference. First operand 1634 states and 6285 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:54,657 INFO L93 Difference]: Finished difference Result 1662 states and 6405 transitions. [2022-11-18 19:34:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:54,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:54,661 INFO L225 Difference]: With dead ends: 1662 [2022-11-18 19:34:54,662 INFO L226 Difference]: Without dead ends: 1662 [2022-11-18 19:34:54,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:54,662 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:54,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-18 19:34:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-11-18 19:34:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1635. [2022-11-18 19:34:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1624 states have (on average 3.872536945812808) internal successors, (6289), 1634 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6289 transitions. [2022-11-18 19:34:54,686 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6289 transitions. Word has length 12 [2022-11-18 19:34:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:54,686 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 6289 transitions. [2022-11-18 19:34:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6289 transitions. [2022-11-18 19:34:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:54,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:54,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:54,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:54,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:54,888 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:54,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1756966656, now seen corresponding path program 2 times [2022-11-18 19:34:54,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:54,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031340385] [2022-11-18 19:34:54,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:34:54,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:54,889 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:54,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-18 19:34:55,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:34:55,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:34:55,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:55,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:55,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:55,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:55,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031340385] [2022-11-18 19:34:55,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031340385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:55,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:55,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:34:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640457636] [2022-11-18 19:34:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:55,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:55,453 INFO L87 Difference]: Start difference. First operand 1635 states and 6289 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:55,632 INFO L93 Difference]: Finished difference Result 1670 states and 6418 transitions. [2022-11-18 19:34:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:55,636 INFO L225 Difference]: With dead ends: 1670 [2022-11-18 19:34:55,636 INFO L226 Difference]: Without dead ends: 1670 [2022-11-18 19:34:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:55,637 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:55,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-18 19:34:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-11-18 19:34:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1646. [2022-11-18 19:34:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1635 states have (on average 3.8678899082568807) internal successors, (6324), 1645 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 6324 transitions. [2022-11-18 19:34:55,667 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 6324 transitions. Word has length 12 [2022-11-18 19:34:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:55,667 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 6324 transitions. [2022-11-18 19:34:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 6324 transitions. [2022-11-18 19:34:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 19:34:55,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:55,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:55,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:55,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:55,868 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:34:55,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1756971554, now seen corresponding path program 3 times [2022-11-18 19:34:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:34:55,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554222735] [2022-11-18 19:34:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:34:55,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:34:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:34:55,870 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:34:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-18 19:34:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 19:34:56,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:34:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:34:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:56,213 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:34:56,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:34:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:56,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:34:56,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:34:56,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554222735] [2022-11-18 19:34:56,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554222735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:34:56,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:34:56,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:34:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468178861] [2022-11-18 19:34:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:34:56,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:34:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:34:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:34:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:34:56,456 INFO L87 Difference]: Start difference. First operand 1646 states and 6324 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:56,622 INFO L93 Difference]: Finished difference Result 1672 states and 6455 transitions. [2022-11-18 19:34:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:34:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 19:34:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:56,626 INFO L225 Difference]: With dead ends: 1672 [2022-11-18 19:34:56,626 INFO L226 Difference]: Without dead ends: 1672 [2022-11-18 19:34:56,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:34:56,626 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-18 19:37:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:59,571 INFO L93 Difference]: Finished difference Result 2692 states and 11563 transitions. [2022-11-18 19:37:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:37:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:37:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:59,580 INFO L225 Difference]: With dead ends: 2692 [2022-11-18 19:37:59,580 INFO L226 Difference]: Without dead ends: 2692 [2022-11-18 19:37:59,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:37:59,580 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:59,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-18 19:37:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-11-18 19:37:59,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2367. [2022-11-18 19:37:59,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2360 states have (on average 4.248728813559322) internal successors, (10027), 2366 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 10027 transitions. [2022-11-18 19:37:59,627 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 10027 transitions. Word has length 13 [2022-11-18 19:37:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:59,628 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 10027 transitions. [2022-11-18 19:37:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 10027 transitions. [2022-11-18 19:37:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:37:59,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:59,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:59,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-18 19:37:59,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:37:59,830 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:37:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash -94476117, now seen corresponding path program 3 times [2022-11-18 19:37:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:37:59,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590099188] [2022-11-18 19:37:59,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:37:59,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:37:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:37:59,831 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:37:59,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-18 19:38:00,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:38:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:00,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:00,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:00,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:01,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590099188] [2022-11-18 19:38:01,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590099188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:01,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:01,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:01,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891946525] [2022-11-18 19:38:01,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:01,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:01,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:01,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:01,267 INFO L87 Difference]: Start difference. First operand 2367 states and 10027 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:02,158 INFO L93 Difference]: Finished difference Result 3162 states and 13606 transitions. [2022-11-18 19:38:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:02,168 INFO L225 Difference]: With dead ends: 3162 [2022-11-18 19:38:02,168 INFO L226 Difference]: Without dead ends: 3162 [2022-11-18 19:38:02,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:02,168 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:02,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 25 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-11-18 19:38:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-11-18 19:38:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2336. [2022-11-18 19:38:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2329 states have (on average 4.218119364534135) internal successors, (9824), 2335 states have internal predecessors, (9824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 9824 transitions. [2022-11-18 19:38:02,214 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 9824 transitions. Word has length 13 [2022-11-18 19:38:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 2336 states and 9824 transitions. [2022-11-18 19:38:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 9824 transitions. [2022-11-18 19:38:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:02,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:02,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:02,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-18 19:38:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:02,416 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1700890243, now seen corresponding path program 1 times [2022-11-18 19:38:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:02,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992195736] [2022-11-18 19:38:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:02,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:02,418 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:02,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-18 19:38:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:02,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:02,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:02,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:03,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992195736] [2022-11-18 19:38:03,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992195736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:03,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:03,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:03,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040268514] [2022-11-18 19:38:03,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:03,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:03,910 INFO L87 Difference]: Start difference. First operand 2336 states and 9824 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:04,108 INFO L93 Difference]: Finished difference Result 2439 states and 10361 transitions. [2022-11-18 19:38:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:04,116 INFO L225 Difference]: With dead ends: 2439 [2022-11-18 19:38:04,116 INFO L226 Difference]: Without dead ends: 2439 [2022-11-18 19:38:04,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:04,116 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:04,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-18 19:38:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-11-18 19:38:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2357. [2022-11-18 19:38:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2350 states have (on average 4.229787234042553) internal successors, (9940), 2356 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 9940 transitions. [2022-11-18 19:38:04,161 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 9940 transitions. Word has length 13 [2022-11-18 19:38:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:04,161 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 9940 transitions. [2022-11-18 19:38:04,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:04,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 9940 transitions. [2022-11-18 19:38:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:04,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:04,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:04,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:04,377 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1700230997, now seen corresponding path program 4 times [2022-11-18 19:38:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528574491] [2022-11-18 19:38:04,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:04,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:04,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:04,379 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:04,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-18 19:38:04,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:04,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:04,885 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:05,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:05,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528574491] [2022-11-18 19:38:05,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528574491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:05,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:05,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808511036] [2022-11-18 19:38:05,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:05,862 INFO L87 Difference]: Start difference. First operand 2357 states and 9940 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:06,466 INFO L93 Difference]: Finished difference Result 2438 states and 10261 transitions. [2022-11-18 19:38:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:06,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:06,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:06,475 INFO L225 Difference]: With dead ends: 2438 [2022-11-18 19:38:06,475 INFO L226 Difference]: Without dead ends: 2438 [2022-11-18 19:38:06,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:06,475 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:06,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-18 19:38:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-11-18 19:38:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2361. [2022-11-18 19:38:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2354 states have (on average 4.229396771452846) internal successors, (9956), 2360 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9956 transitions. [2022-11-18 19:38:06,523 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9956 transitions. Word has length 13 [2022-11-18 19:38:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:06,523 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9956 transitions. [2022-11-18 19:38:06,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9956 transitions. [2022-11-18 19:38:06,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:06,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:06,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:06,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Ended with exit code 0 [2022-11-18 19:38:06,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:06,726 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1700248667, now seen corresponding path program 5 times [2022-11-18 19:38:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:06,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760479963] [2022-11-18 19:38:06,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:38:06,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:06,727 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:06,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-18 19:38:07,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:07,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:07,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:07,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:08,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760479963] [2022-11-18 19:38:08,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760479963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:08,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:08,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:08,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603933239] [2022-11-18 19:38:08,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:08,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:08,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:08,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:08,272 INFO L87 Difference]: Start difference. First operand 2361 states and 9956 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:08,789 INFO L93 Difference]: Finished difference Result 2432 states and 10243 transitions. [2022-11-18 19:38:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:08,796 INFO L225 Difference]: With dead ends: 2432 [2022-11-18 19:38:08,796 INFO L226 Difference]: Without dead ends: 2432 [2022-11-18 19:38:08,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:08,796 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:08,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2022-11-18 19:38:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-11-18 19:38:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2364. [2022-11-18 19:38:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2357 states have (on average 4.230801866779805) internal successors, (9972), 2363 states have internal predecessors, (9972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9972 transitions. [2022-11-18 19:38:08,837 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9972 transitions. Word has length 13 [2022-11-18 19:38:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:08,838 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 9972 transitions. [2022-11-18 19:38:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9972 transitions. [2022-11-18 19:38:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:08,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:08,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:08,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-18 19:38:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:09,040 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:09,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1700244823, now seen corresponding path program 2 times [2022-11-18 19:38:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973241727] [2022-11-18 19:38:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:09,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:09,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:09,041 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-18 19:38:09,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:09,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:09,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:09,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:09,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:09,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:10,457 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:10,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973241727] [2022-11-18 19:38:10,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973241727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:10,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:10,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538020651] [2022-11-18 19:38:10,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:10,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:10,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:10,458 INFO L87 Difference]: Start difference. First operand 2364 states and 9972 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:10,704 INFO L93 Difference]: Finished difference Result 2458 states and 10458 transitions. [2022-11-18 19:38:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:10,711 INFO L225 Difference]: With dead ends: 2458 [2022-11-18 19:38:10,711 INFO L226 Difference]: Without dead ends: 2458 [2022-11-18 19:38:10,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:10,712 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:10,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-18 19:38:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-18 19:38:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2366. [2022-11-18 19:38:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2359 states have (on average 4.230606189063162) internal successors, (9980), 2365 states have internal predecessors, (9980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 9980 transitions. [2022-11-18 19:38:10,752 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 9980 transitions. Word has length 13 [2022-11-18 19:38:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:10,752 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 9980 transitions. [2022-11-18 19:38:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 9980 transitions. [2022-11-18 19:38:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:10,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:10,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:10,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-18 19:38:10,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:10,954 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1700111833, now seen corresponding path program 3 times [2022-11-18 19:38:10,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:10,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656943770] [2022-11-18 19:38:10,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:38:10,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:10,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:10,956 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:10,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-18 19:38:11,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:38:11,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:11,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:11,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:11,504 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:11,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:11,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:12,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:12,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656943770] [2022-11-18 19:38:12,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656943770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:12,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:12,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616891597] [2022-11-18 19:38:12,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:12,438 INFO L87 Difference]: Start difference. First operand 2366 states and 9980 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:13,007 INFO L93 Difference]: Finished difference Result 2486 states and 10613 transitions. [2022-11-18 19:38:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:13,014 INFO L225 Difference]: With dead ends: 2486 [2022-11-18 19:38:13,014 INFO L226 Difference]: Without dead ends: 2486 [2022-11-18 19:38:13,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:13,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:13,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 17 Unchecked, 0.5s Time] [2022-11-18 19:38:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-11-18 19:38:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2365. [2022-11-18 19:38:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2358 states have (on average 4.230279898218829) internal successors, (9975), 2364 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 9975 transitions. [2022-11-18 19:38:13,062 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 9975 transitions. Word has length 13 [2022-11-18 19:38:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:13,063 INFO L495 AbstractCegarLoop]: Abstraction has 2365 states and 9975 transitions. [2022-11-18 19:38:13,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 9975 transitions. [2022-11-18 19:38:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:13,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:13,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:13,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Ended with exit code 0 [2022-11-18 19:38:13,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:13,265 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1543131677, now seen corresponding path program 6 times [2022-11-18 19:38:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113246448] [2022-11-18 19:38:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:38:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:13,267 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:13,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-18 19:38:13,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:38:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:13,784 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:13,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:14,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:14,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113246448] [2022-11-18 19:38:14,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113246448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:14,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:14,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558476301] [2022-11-18 19:38:14,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:14,686 INFO L87 Difference]: Start difference. First operand 2365 states and 9975 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:15,407 INFO L93 Difference]: Finished difference Result 2674 states and 11303 transitions. [2022-11-18 19:38:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:15,416 INFO L225 Difference]: With dead ends: 2674 [2022-11-18 19:38:15,416 INFO L226 Difference]: Without dead ends: 2674 [2022-11-18 19:38:15,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:15,416 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:15,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-11-18 19:38:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-11-18 19:38:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2394. [2022-11-18 19:38:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2387 states have (on average 4.22496857980729) internal successors, (10085), 2393 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 10085 transitions. [2022-11-18 19:38:15,460 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 10085 transitions. Word has length 13 [2022-11-18 19:38:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:15,460 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 10085 transitions. [2022-11-18 19:38:15,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 10085 transitions. [2022-11-18 19:38:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:15,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:15,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:15,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Ended with exit code 0 [2022-11-18 19:38:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:15,662 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1543136327, now seen corresponding path program 7 times [2022-11-18 19:38:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:15,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872239376] [2022-11-18 19:38:15,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:38:15,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:15,664 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:15,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-18 19:38:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:16,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:16,191 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:16,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:17,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:17,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872239376] [2022-11-18 19:38:17,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872239376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:17,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:17,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133820609] [2022-11-18 19:38:17,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:17,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:17,158 INFO L87 Difference]: Start difference. First operand 2394 states and 10085 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:17,992 INFO L93 Difference]: Finished difference Result 3099 states and 13294 transitions. [2022-11-18 19:38:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:18,000 INFO L225 Difference]: With dead ends: 3099 [2022-11-18 19:38:18,000 INFO L226 Difference]: Without dead ends: 3099 [2022-11-18 19:38:18,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:18,000 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:18,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 80 Unchecked, 0.8s Time] [2022-11-18 19:38:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-11-18 19:38:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2507. [2022-11-18 19:38:18,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2500 states have (on average 4.2156) internal successors, (10539), 2506 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 10539 transitions. [2022-11-18 19:38:18,044 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 10539 transitions. Word has length 13 [2022-11-18 19:38:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:18,044 INFO L495 AbstractCegarLoop]: Abstraction has 2507 states and 10539 transitions. [2022-11-18 19:38:18,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 10539 transitions. [2022-11-18 19:38:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:18,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:18,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:18,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Ended with exit code 0 [2022-11-18 19:38:18,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:18,246 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:18,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1543679447, now seen corresponding path program 8 times [2022-11-18 19:38:18,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:18,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740580050] [2022-11-18 19:38:18,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:18,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:18,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:18,248 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-18 19:38:18,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:18,805 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:18,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:19,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:19,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:19,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740580050] [2022-11-18 19:38:19,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740580050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:19,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:19,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320055743] [2022-11-18 19:38:19,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:19,735 INFO L87 Difference]: Start difference. First operand 2507 states and 10539 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:20,479 INFO L93 Difference]: Finished difference Result 2813 states and 11841 transitions. [2022-11-18 19:38:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:20,487 INFO L225 Difference]: With dead ends: 2813 [2022-11-18 19:38:20,487 INFO L226 Difference]: Without dead ends: 2813 [2022-11-18 19:38:20,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:20,487 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:20,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 46 Unchecked, 0.7s Time] [2022-11-18 19:38:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-11-18 19:38:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2575. [2022-11-18 19:38:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2568 states have (on average 4.248052959501558) internal successors, (10909), 2574 states have internal predecessors, (10909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10909 transitions. [2022-11-18 19:38:20,555 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10909 transitions. Word has length 13 [2022-11-18 19:38:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:20,555 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10909 transitions. [2022-11-18 19:38:20,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10909 transitions. [2022-11-18 19:38:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:20,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:20,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:20,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-18 19:38:20,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:20,760 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1543845917, now seen corresponding path program 9 times [2022-11-18 19:38:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628748435] [2022-11-18 19:38:20,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:38:20,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:20,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:20,762 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:20,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-18 19:38:21,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:38:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:21,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:21,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:21,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:21,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:22,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:22,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628748435] [2022-11-18 19:38:22,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628748435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:22,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:22,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916003438] [2022-11-18 19:38:22,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:22,168 INFO L87 Difference]: Start difference. First operand 2575 states and 10909 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:23,043 INFO L93 Difference]: Finished difference Result 3207 states and 13733 transitions. [2022-11-18 19:38:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:23,054 INFO L225 Difference]: With dead ends: 3207 [2022-11-18 19:38:23,054 INFO L226 Difference]: Without dead ends: 3207 [2022-11-18 19:38:23,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:23,054 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:23,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 120 Unchecked, 0.8s Time] [2022-11-18 19:38:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-11-18 19:38:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2560. [2022-11-18 19:38:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2553 states have (on average 4.2420681551116335) internal successors, (10830), 2559 states have internal predecessors, (10830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 10830 transitions. [2022-11-18 19:38:23,102 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 10830 transitions. Word has length 13 [2022-11-18 19:38:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:23,102 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 10830 transitions. [2022-11-18 19:38:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 10830 transitions. [2022-11-18 19:38:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:23,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:23,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:23,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Ended with exit code 0 [2022-11-18 19:38:23,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:23,304 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -873649787, now seen corresponding path program 4 times [2022-11-18 19:38:23,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:23,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143228384] [2022-11-18 19:38:23,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:23,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:23,306 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:23,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-18 19:38:23,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:23,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:23,820 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:23,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:24,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:24,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143228384] [2022-11-18 19:38:24,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143228384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:24,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:24,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:24,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906204464] [2022-11-18 19:38:24,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:24,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:24,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:24,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:24,762 INFO L87 Difference]: Start difference. First operand 2560 states and 10830 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:25,342 INFO L93 Difference]: Finished difference Result 2643 states and 11248 transitions. [2022-11-18 19:38:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:25,351 INFO L225 Difference]: With dead ends: 2643 [2022-11-18 19:38:25,351 INFO L226 Difference]: Without dead ends: 2643 [2022-11-18 19:38:25,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:25,352 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:25,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-18 19:38:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2022-11-18 19:38:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2575. [2022-11-18 19:38:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2568 states have (on average 4.250778816199377) internal successors, (10916), 2574 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10916 transitions. [2022-11-18 19:38:25,422 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10916 transitions. Word has length 13 [2022-11-18 19:38:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:25,423 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10916 transitions. [2022-11-18 19:38:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10916 transitions. [2022-11-18 19:38:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:25,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:25,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:25,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:25,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:25,638 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash -873647927, now seen corresponding path program 5 times [2022-11-18 19:38:25,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:25,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145584338] [2022-11-18 19:38:25,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:38:25,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:25,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:25,640 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:25,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-18 19:38:26,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:26,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:26,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:26,175 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:26,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:27,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:27,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145584338] [2022-11-18 19:38:27,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145584338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:27,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:27,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:27,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328227301] [2022-11-18 19:38:27,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:27,105 INFO L87 Difference]: Start difference. First operand 2575 states and 10916 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:27,586 INFO L93 Difference]: Finished difference Result 2721 states and 11617 transitions. [2022-11-18 19:38:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:27,594 INFO L225 Difference]: With dead ends: 2721 [2022-11-18 19:38:27,594 INFO L226 Difference]: Without dead ends: 2721 [2022-11-18 19:38:27,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:27,595 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:27,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-18 19:38:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-18 19:38:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2595. [2022-11-18 19:38:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2588 states have (on average 4.264683153013911) internal successors, (11037), 2594 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 11037 transitions. [2022-11-18 19:38:27,642 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 11037 transitions. Word has length 13 [2022-11-18 19:38:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:27,642 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 11037 transitions. [2022-11-18 19:38:27,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 11037 transitions. [2022-11-18 19:38:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:27,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:27,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:27,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-18 19:38:27,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:27,844 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -893657807, now seen corresponding path program 6 times [2022-11-18 19:38:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65396401] [2022-11-18 19:38:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:38:27,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:27,845 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:27,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-18 19:38:28,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:38:28,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:28,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:28,373 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:28,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:28,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:29,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:29,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65396401] [2022-11-18 19:38:29,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65396401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:29,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:29,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:29,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334008368] [2022-11-18 19:38:29,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:29,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:29,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:29,254 INFO L87 Difference]: Start difference. First operand 2595 states and 11037 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:29,914 INFO L93 Difference]: Finished difference Result 2855 states and 12232 transitions. [2022-11-18 19:38:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:29,922 INFO L225 Difference]: With dead ends: 2855 [2022-11-18 19:38:29,923 INFO L226 Difference]: Without dead ends: 2855 [2022-11-18 19:38:29,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:29,923 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:29,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 40 Unchecked, 0.6s Time] [2022-11-18 19:38:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2022-11-18 19:38:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2658. [2022-11-18 19:38:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2651 states have (on average 4.273104488872124) internal successors, (11328), 2657 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 11328 transitions. [2022-11-18 19:38:29,972 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 11328 transitions. Word has length 13 [2022-11-18 19:38:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:29,972 INFO L495 AbstractCegarLoop]: Abstraction has 2658 states and 11328 transitions. [2022-11-18 19:38:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 11328 transitions. [2022-11-18 19:38:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:29,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:29,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:29,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:30,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:30,174 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash -893519113, now seen corresponding path program 10 times [2022-11-18 19:38:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489507127] [2022-11-18 19:38:30,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:30,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:30,175 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:30,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-18 19:38:30,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:30,698 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:30,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:31,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:31,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489507127] [2022-11-18 19:38:31,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489507127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:31,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:31,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547276873] [2022-11-18 19:38:31,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:31,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:31,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:31,640 INFO L87 Difference]: Start difference. First operand 2658 states and 11328 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:32,251 INFO L93 Difference]: Finished difference Result 2698 states and 11478 transitions. [2022-11-18 19:38:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:32,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:32,259 INFO L225 Difference]: With dead ends: 2698 [2022-11-18 19:38:32,259 INFO L226 Difference]: Without dead ends: 2698 [2022-11-18 19:38:32,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:32,260 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:32,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-11-18 19:38:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2022-11-18 19:38:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2671. [2022-11-18 19:38:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2664 states have (on average 4.273648648648648) internal successors, (11385), 2670 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 11385 transitions. [2022-11-18 19:38:32,310 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 11385 transitions. Word has length 13 [2022-11-18 19:38:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:32,310 INFO L495 AbstractCegarLoop]: Abstraction has 2671 states and 11385 transitions. [2022-11-18 19:38:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 11385 transitions. [2022-11-18 19:38:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:32,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:32,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:32,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:32,527 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash -897780497, now seen corresponding path program 7 times [2022-11-18 19:38:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:32,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917628065] [2022-11-18 19:38:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:38:32,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:32,529 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:32,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-18 19:38:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:32,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:32,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:33,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:33,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:33,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:34,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:34,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917628065] [2022-11-18 19:38:34,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917628065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:34,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661469837] [2022-11-18 19:38:34,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:34,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:34,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:34,027 INFO L87 Difference]: Start difference. First operand 2671 states and 11385 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:34,626 INFO L93 Difference]: Finished difference Result 2743 states and 11753 transitions. [2022-11-18 19:38:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:34,634 INFO L225 Difference]: With dead ends: 2743 [2022-11-18 19:38:34,634 INFO L226 Difference]: Without dead ends: 2743 [2022-11-18 19:38:34,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:34,634 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:34,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 16 Unchecked, 0.5s Time] [2022-11-18 19:38:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-11-18 19:38:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2688. [2022-11-18 19:38:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2681 states have (on average 4.279746363297277) internal successors, (11474), 2687 states have internal predecessors, (11474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 11474 transitions. [2022-11-18 19:38:34,681 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 11474 transitions. Word has length 13 [2022-11-18 19:38:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:34,681 INFO L495 AbstractCegarLoop]: Abstraction has 2688 states and 11474 transitions. [2022-11-18 19:38:34,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 11474 transitions. [2022-11-18 19:38:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:34,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:34,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:34,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-18 19:38:34,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:34,883 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash -897778637, now seen corresponding path program 8 times [2022-11-18 19:38:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606580370] [2022-11-18 19:38:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:34,885 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-18 19:38:35,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:35,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:35,461 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:35,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:35,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:36,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:36,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606580370] [2022-11-18 19:38:36,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606580370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:36,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:36,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:36,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145564846] [2022-11-18 19:38:36,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:36,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:36,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:36,365 INFO L87 Difference]: Start difference. First operand 2688 states and 11474 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:37,271 INFO L93 Difference]: Finished difference Result 3195 states and 13807 transitions. [2022-11-18 19:38:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:37,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:37,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:37,280 INFO L225 Difference]: With dead ends: 3195 [2022-11-18 19:38:37,281 INFO L226 Difference]: Without dead ends: 3195 [2022-11-18 19:38:37,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:37,281 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:37,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 26 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 81 Unchecked, 0.8s Time] [2022-11-18 19:38:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2022-11-18 19:38:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 2779. [2022-11-18 19:38:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2772 states have (on average 4.31998556998557) internal successors, (11975), 2778 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 11975 transitions. [2022-11-18 19:38:37,333 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 11975 transitions. Word has length 13 [2022-11-18 19:38:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:37,333 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 11975 transitions. [2022-11-18 19:38:37,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 11975 transitions. [2022-11-18 19:38:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:37,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:37,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:37,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-18 19:38:37,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:37,535 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -893479123, now seen corresponding path program 11 times [2022-11-18 19:38:37,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972232419] [2022-11-18 19:38:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:38:37,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:37,536 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:37,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-18 19:38:37,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:37,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:38,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:38,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:38,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:39,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:39,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972232419] [2022-11-18 19:38:39,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972232419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:39,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:39,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130818056] [2022-11-18 19:38:39,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:39,069 INFO L87 Difference]: Start difference. First operand 2779 states and 11975 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:39,576 INFO L93 Difference]: Finished difference Result 2852 states and 12234 transitions. [2022-11-18 19:38:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:39,584 INFO L225 Difference]: With dead ends: 2852 [2022-11-18 19:38:39,584 INFO L226 Difference]: Without dead ends: 2852 [2022-11-18 19:38:39,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:39,584 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:39,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-18 19:38:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-11-18 19:38:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2781. [2022-11-18 19:38:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2774 states have (on average 4.319754866618601) internal successors, (11983), 2780 states have internal predecessors, (11983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 11983 transitions. [2022-11-18 19:38:39,632 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 11983 transitions. Word has length 13 [2022-11-18 19:38:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:39,632 INFO L495 AbstractCegarLoop]: Abstraction has 2781 states and 11983 transitions. [2022-11-18 19:38:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 11983 transitions. [2022-11-18 19:38:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:39,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:39,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:39,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-18 19:38:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:39,839 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -893461453, now seen corresponding path program 12 times [2022-11-18 19:38:39,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:39,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050979687] [2022-11-18 19:38:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:38:39,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:39,841 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:39,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-18 19:38:40,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:38:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:40,385 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:40,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:40,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:41,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:41,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050979687] [2022-11-18 19:38:41,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050979687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:41,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:41,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20803387] [2022-11-18 19:38:41,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:41,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:41,253 INFO L87 Difference]: Start difference. First operand 2781 states and 11983 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:41,806 INFO L93 Difference]: Finished difference Result 2844 states and 12214 transitions. [2022-11-18 19:38:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:41,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:41,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:41,814 INFO L225 Difference]: With dead ends: 2844 [2022-11-18 19:38:41,814 INFO L226 Difference]: Without dead ends: 2844 [2022-11-18 19:38:41,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:41,815 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:41,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-18 19:38:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-18 19:38:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2784. [2022-11-18 19:38:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2777 states have (on average 4.320129636298163) internal successors, (11997), 2783 states have internal predecessors, (11997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 11997 transitions. [2022-11-18 19:38:41,885 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 11997 transitions. Word has length 13 [2022-11-18 19:38:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:41,885 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 11997 transitions. [2022-11-18 19:38:41,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 11997 transitions. [2022-11-18 19:38:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:41,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:41,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:41,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-18 19:38:42,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:42,087 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash -893465297, now seen corresponding path program 9 times [2022-11-18 19:38:42,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:42,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728047836] [2022-11-18 19:38:42,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:38:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:42,089 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:42,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-18 19:38:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:38:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:42,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:42,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:42,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:43,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:43,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728047836] [2022-11-18 19:38:43,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728047836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:43,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:43,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:43,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787157588] [2022-11-18 19:38:43,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:43,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:43,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:43,678 INFO L87 Difference]: Start difference. First operand 2784 states and 11997 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:43,982 INFO L93 Difference]: Finished difference Result 2866 states and 12427 transitions. [2022-11-18 19:38:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:43,989 INFO L225 Difference]: With dead ends: 2866 [2022-11-18 19:38:43,990 INFO L226 Difference]: Without dead ends: 2866 [2022-11-18 19:38:43,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:43,990 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:43,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-18 19:38:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-11-18 19:38:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2783. [2022-11-18 19:38:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2776 states have (on average 4.321325648414986) internal successors, (11996), 2782 states have internal predecessors, (11996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 11996 transitions. [2022-11-18 19:38:44,039 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 11996 transitions. Word has length 13 [2022-11-18 19:38:44,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:44,039 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 11996 transitions. [2022-11-18 19:38:44,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 11996 transitions. [2022-11-18 19:38:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:44,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:44,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:44,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Ended with exit code 0 [2022-11-18 19:38:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:44,241 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1451614527, now seen corresponding path program 13 times [2022-11-18 19:38:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336557629] [2022-11-18 19:38:44,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:38:44,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:44,243 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:44,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-18 19:38:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:44,784 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:44,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:45,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:45,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:45,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336557629] [2022-11-18 19:38:45,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336557629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:45,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:45,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260602470] [2022-11-18 19:38:45,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:45,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:45,755 INFO L87 Difference]: Start difference. First operand 2783 states and 11996 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:46,535 INFO L93 Difference]: Finished difference Result 3000 states and 12846 transitions. [2022-11-18 19:38:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:38:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:46,544 INFO L225 Difference]: With dead ends: 3000 [2022-11-18 19:38:46,544 INFO L226 Difference]: Without dead ends: 3000 [2022-11-18 19:38:46,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:46,544 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:46,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-11-18 19:38:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-11-18 19:38:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2798. [2022-11-18 19:38:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2791 states have (on average 4.315657470440702) internal successors, (12045), 2797 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 12045 transitions. [2022-11-18 19:38:46,599 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 12045 transitions. Word has length 13 [2022-11-18 19:38:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:46,599 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 12045 transitions. [2022-11-18 19:38:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 12045 transitions. [2022-11-18 19:38:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:46,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:46,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:46,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Ended with exit code 0 [2022-11-18 19:38:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:46,802 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1450374837, now seen corresponding path program 14 times [2022-11-18 19:38:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:46,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052378503] [2022-11-18 19:38:46,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:38:46,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:46,803 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:46,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-18 19:38:47,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:47,368 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:47,368 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:47,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:48,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:48,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052378503] [2022-11-18 19:38:48,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052378503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:48,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:48,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009017912] [2022-11-18 19:38:48,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:48,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:48,265 INFO L87 Difference]: Start difference. First operand 2798 states and 12045 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:49,124 INFO L93 Difference]: Finished difference Result 3330 states and 14413 transitions. [2022-11-18 19:38:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:49,134 INFO L225 Difference]: With dead ends: 3330 [2022-11-18 19:38:49,134 INFO L226 Difference]: Without dead ends: 3330 [2022-11-18 19:38:49,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:49,134 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:49,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 94 Unchecked, 0.8s Time] [2022-11-18 19:38:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-11-18 19:38:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2894. [2022-11-18 19:38:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2887 states have (on average 4.357810876342223) internal successors, (12581), 2893 states have internal predecessors, (12581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12581 transitions. [2022-11-18 19:38:49,190 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12581 transitions. Word has length 13 [2022-11-18 19:38:49,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:49,190 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12581 transitions. [2022-11-18 19:38:49,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12581 transitions. [2022-11-18 19:38:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:49,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:49,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:49,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Ended with exit code 0 [2022-11-18 19:38:49,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:49,392 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1450370187, now seen corresponding path program 15 times [2022-11-18 19:38:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:49,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226479974] [2022-11-18 19:38:49,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:38:49,393 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 [2022-11-18 19:38:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:49,394 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:49,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-18 19:38:49,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:38:49,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:49,932 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:49,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:50,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:38:50,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226479974] [2022-11-18 19:38:50,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226479974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:50,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:50,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167060985] [2022-11-18 19:38:50,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:50,854 INFO L87 Difference]: Start difference. First operand 2894 states and 12581 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:51,738 INFO L93 Difference]: Finished difference Result 3432 states and 14721 transitions. [2022-11-18 19:38:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:51,748 INFO L225 Difference]: With dead ends: 3432 [2022-11-18 19:38:51,748 INFO L226 Difference]: Without dead ends: 3432 [2022-11-18 19:38:51,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:51,748 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:51,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 177 Unchecked, 0.8s Time] [2022-11-18 19:38:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2022-11-18 19:38:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2754. [2022-11-18 19:38:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2747 states have (on average 4.3054240990171095) internal successors, (11827), 2753 states have internal predecessors, (11827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 11827 transitions. [2022-11-18 19:38:51,808 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 11827 transitions. Word has length 13 [2022-11-18 19:38:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:51,808 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 11827 transitions. [2022-11-18 19:38:51,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 11827 transitions. [2022-11-18 19:38:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:51,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:51,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:51,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Ended with exit code 0 [2022-11-18 19:38:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:52,010 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1449827067, now seen corresponding path program 16 times [2022-11-18 19:38:52,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:52,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792135424] [2022-11-18 19:38:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:52,012 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:52,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-18 19:38:52,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:52,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:52,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:52,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:52,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:53,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:53,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792135424] [2022-11-18 19:38:53,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792135424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:53,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:53,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:53,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733341251] [2022-11-18 19:38:53,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:53,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:53,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:53,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:53,577 INFO L87 Difference]: Start difference. First operand 2754 states and 11827 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:54,401 INFO L93 Difference]: Finished difference Result 3136 states and 13521 transitions. [2022-11-18 19:38:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:54,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:54,410 INFO L225 Difference]: With dead ends: 3136 [2022-11-18 19:38:54,410 INFO L226 Difference]: Without dead ends: 3136 [2022-11-18 19:38:54,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:54,411 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:54,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 36 Unchecked, 0.8s Time] [2022-11-18 19:38:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2022-11-18 19:38:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2795. [2022-11-18 19:38:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.3299856527977045) internal successors, (12072), 2794 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12072 transitions. [2022-11-18 19:38:54,489 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12072 transitions. Word has length 13 [2022-11-18 19:38:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:54,489 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12072 transitions. [2022-11-18 19:38:54,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12072 transitions. [2022-11-18 19:38:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:54,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:54,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:54,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-18 19:38:54,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:54,691 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1449660597, now seen corresponding path program 17 times [2022-11-18 19:38:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795802248] [2022-11-18 19:38:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:38:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:54,693 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:54,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-18 19:38:55,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:38:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:55,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:55,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:55,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:55,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:56,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795802248] [2022-11-18 19:38:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795802248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:56,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:56,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838923559] [2022-11-18 19:38:56,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:56,277 INFO L87 Difference]: Start difference. First operand 2795 states and 12072 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:56,529 INFO L93 Difference]: Finished difference Result 2844 states and 12262 transitions. [2022-11-18 19:38:56,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:56,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:56,537 INFO L225 Difference]: With dead ends: 2844 [2022-11-18 19:38:56,537 INFO L226 Difference]: Without dead ends: 2844 [2022-11-18 19:38:56,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:56,537 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:56,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-18 19:38:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-18 19:38:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2795. [2022-11-18 19:38:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.3299856527977045) internal successors, (12072), 2794 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12072 transitions. [2022-11-18 19:38:56,587 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12072 transitions. Word has length 13 [2022-11-18 19:38:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:56,587 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12072 transitions. [2022-11-18 19:38:56,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12072 transitions. [2022-11-18 19:38:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:56,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:56,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:56,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Ended with exit code 0 [2022-11-18 19:38:56,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:56,789 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1447175761, now seen corresponding path program 10 times [2022-11-18 19:38:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:56,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968536503] [2022-11-18 19:38:56,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:38:56,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:56,791 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:56,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-18 19:38:57,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:38:57,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:57,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:38:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:57,325 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:57,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:38:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:57,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:38:58,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:38:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968536503] [2022-11-18 19:38:58,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968536503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:58,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:38:58,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:38:58,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539844698] [2022-11-18 19:38:58,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:58,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:38:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:38:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:38:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:38:58,312 INFO L87 Difference]: Start difference. First operand 2795 states and 12072 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:59,039 INFO L93 Difference]: Finished difference Result 3154 states and 13777 transitions. [2022-11-18 19:38:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:38:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:38:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:59,048 INFO L225 Difference]: With dead ends: 3154 [2022-11-18 19:38:59,048 INFO L226 Difference]: Without dead ends: 3154 [2022-11-18 19:38:59,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:38:59,048 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:59,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 104 Unchecked, 0.7s Time] [2022-11-18 19:38:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2022-11-18 19:38:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2813. [2022-11-18 19:38:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2806 states have (on average 4.337847469707769) internal successors, (12172), 2812 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 12172 transitions. [2022-11-18 19:38:59,100 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 12172 transitions. Word has length 13 [2022-11-18 19:38:59,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:59,100 INFO L495 AbstractCegarLoop]: Abstraction has 2813 states and 12172 transitions. [2022-11-18 19:38:59,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 12172 transitions. [2022-11-18 19:38:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:38:59,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:59,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:59,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Ended with exit code 0 [2022-11-18 19:38:59,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:59,302 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:38:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1447037067, now seen corresponding path program 18 times [2022-11-18 19:38:59,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:38:59,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124526229] [2022-11-18 19:38:59,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:38:59,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:38:59,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:38:59,304 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:38:59,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-18 19:38:59,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 19:38:59,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:38:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:59,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:38:59,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:39:00,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:39:00,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124526229] [2022-11-18 19:39:00,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124526229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:00,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:00,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:00,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553423355] [2022-11-18 19:39:00,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:00,915 INFO L87 Difference]: Start difference. First operand 2813 states and 12172 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:01,559 INFO L93 Difference]: Finished difference Result 2872 states and 12398 transitions. [2022-11-18 19:39:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:39:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:01,568 INFO L225 Difference]: With dead ends: 2872 [2022-11-18 19:39:01,568 INFO L226 Difference]: Without dead ends: 2872 [2022-11-18 19:39:01,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:01,568 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:01,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2022-11-18 19:39:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2022-11-18 19:39:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2795. [2022-11-18 19:39:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.336083213773314) internal successors, (12089), 2794 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12089 transitions. [2022-11-18 19:39:01,623 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12089 transitions. Word has length 13 [2022-11-18 19:39:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:01,623 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12089 transitions. [2022-11-18 19:39:01,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12089 transitions. [2022-11-18 19:39:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:01,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:01,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:01,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Ended with exit code 0 [2022-11-18 19:39:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:01,825 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -807342717, now seen corresponding path program 1 times [2022-11-18 19:39:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:01,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923209772] [2022-11-18 19:39:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:01,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:01,827 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:01,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-18 19:39:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:39:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:02,364 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:02,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:02,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:03,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923209772] [2022-11-18 19:39:03,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923209772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:03,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:03,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:03,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868662759] [2022-11-18 19:39:03,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:03,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:03,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:03,251 INFO L87 Difference]: Start difference. First operand 2795 states and 12089 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:03,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:03,667 INFO L93 Difference]: Finished difference Result 2990 states and 13071 transitions. [2022-11-18 19:39:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:39:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:03,676 INFO L225 Difference]: With dead ends: 2990 [2022-11-18 19:39:03,676 INFO L226 Difference]: Without dead ends: 2990 [2022-11-18 19:39:03,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:03,676 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:03,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-11-18 19:39:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2022-11-18 19:39:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2827. [2022-11-18 19:39:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2820 states have (on average 4.340070921985816) internal successors, (12239), 2826 states have internal predecessors, (12239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 12239 transitions. [2022-11-18 19:39:03,730 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 12239 transitions. Word has length 13 [2022-11-18 19:39:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:03,730 INFO L495 AbstractCegarLoop]: Abstraction has 2827 states and 12239 transitions. [2022-11-18 19:39:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 12239 transitions. [2022-11-18 19:39:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:03,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:03,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:03,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Ended with exit code 0 [2022-11-18 19:39:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:03,932 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -807541737, now seen corresponding path program 2 times [2022-11-18 19:39:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948654124] [2022-11-18 19:39:03,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:39:03,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:03,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:03,933 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:03,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2022-11-18 19:39:04,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:39:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:04,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:39:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:04,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:04,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:04,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:05,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948654124] [2022-11-18 19:39:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948654124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:05,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749395800] [2022-11-18 19:39:05,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:05,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:05,516 INFO L87 Difference]: Start difference. First operand 2827 states and 12239 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:06,089 INFO L93 Difference]: Finished difference Result 2988 states and 12887 transitions. [2022-11-18 19:39:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:39:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:06,098 INFO L225 Difference]: With dead ends: 2988 [2022-11-18 19:39:06,098 INFO L226 Difference]: Without dead ends: 2988 [2022-11-18 19:39:06,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:06,098 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:06,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-18 19:39:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-18 19:39:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2856. [2022-11-18 19:39:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2849 states have (on average 4.336609336609337) internal successors, (12355), 2855 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 12355 transitions. [2022-11-18 19:39:06,224 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 12355 transitions. Word has length 13 [2022-11-18 19:39:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:06,224 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 12355 transitions. [2022-11-18 19:39:06,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 12355 transitions. [2022-11-18 19:39:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:06,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:06,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:06,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Forceful destruction successful, exit code 0 [2022-11-18 19:39:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:06,439 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -807688677, now seen corresponding path program 3 times [2022-11-18 19:39:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049343749] [2022-11-18 19:39:06,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:39:06,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:06,441 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:06,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-18 19:39:06,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:39:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:39:06,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:07,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:07,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:07,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:07,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049343749] [2022-11-18 19:39:07,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049343749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:07,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:07,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:07,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746843315] [2022-11-18 19:39:07,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:07,869 INFO L87 Difference]: Start difference. First operand 2856 states and 12355 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:08,473 INFO L93 Difference]: Finished difference Result 3104 states and 13411 transitions. [2022-11-18 19:39:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:39:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:08,482 INFO L225 Difference]: With dead ends: 3104 [2022-11-18 19:39:08,482 INFO L226 Difference]: Without dead ends: 3104 [2022-11-18 19:39:08,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:08,482 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:08,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-18 19:39:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2022-11-18 19:39:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2885. [2022-11-18 19:39:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2878 states have (on average 4.338776928422516) internal successors, (12487), 2884 states have internal predecessors, (12487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 12487 transitions. [2022-11-18 19:39:08,532 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 12487 transitions. Word has length 13 [2022-11-18 19:39:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:08,532 INFO L495 AbstractCegarLoop]: Abstraction has 2885 states and 12487 transitions. [2022-11-18 19:39:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 12487 transitions. [2022-11-18 19:39:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:08,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:08,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:08,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Ended with exit code 0 [2022-11-18 19:39:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:08,734 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash -928711251, now seen corresponding path program 1 times [2022-11-18 19:39:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:08,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690139911] [2022-11-18 19:39:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:08,736 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-18 19:39:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:39:09,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:09,275 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:09,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:09,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:10,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690139911] [2022-11-18 19:39:10,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690139911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:10,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:10,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:10,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107658418] [2022-11-18 19:39:10,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:10,237 INFO L87 Difference]: Start difference. First operand 2885 states and 12487 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:10,680 INFO L93 Difference]: Finished difference Result 3046 states and 13224 transitions. [2022-11-18 19:39:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:39:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:10,689 INFO L225 Difference]: With dead ends: 3046 [2022-11-18 19:39:10,689 INFO L226 Difference]: Without dead ends: 3046 [2022-11-18 19:39:10,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:10,690 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:10,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 17 Unchecked, 0.4s Time] [2022-11-18 19:39:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-11-18 19:39:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2893. [2022-11-18 19:39:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2886 states have (on average 4.335065835065835) internal successors, (12511), 2892 states have internal predecessors, (12511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 12511 transitions. [2022-11-18 19:39:10,743 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 12511 transitions. Word has length 13 [2022-11-18 19:39:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:10,743 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 12511 transitions. [2022-11-18 19:39:10,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 12511 transitions. [2022-11-18 19:39:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:10,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:10,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:10,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Ended with exit code 0 [2022-11-18 19:39:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:10,946 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:10,947 INFO L85 PathProgramCache]: Analyzing trace with hash -928145222, now seen corresponding path program 1 times [2022-11-18 19:39:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:10,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469977649] [2022-11-18 19:39:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:39:10,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:10,948 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:10,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2022-11-18 19:39:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:39:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:11,483 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:11,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:12,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469977649] [2022-11-18 19:39:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469977649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:12,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:39:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548032012] [2022-11-18 19:39:12,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:12,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:39:12,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:39:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:39:12,839 INFO L87 Difference]: Start difference. First operand 2893 states and 12511 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) [2022-11-18 19:39:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:17,682 INFO L93 Difference]: Finished difference Result 7397 states and 33906 transitions. [2022-11-18 19:39:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:39:17,684 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 [2022-11-18 19:39:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:17,705 INFO L225 Difference]: With dead ends: 7397 [2022-11-18 19:39:17,705 INFO L226 Difference]: Without dead ends: 7397 [2022-11-18 19:39:17,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:39:17,705 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 275 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:17,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 71 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 349 Invalid, 0 Unknown, 154 Unchecked, 2.2s Time] [2022-11-18 19:39:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-11-18 19:39:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 3237. [2022-11-18 19:39:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3230 states have (on average 4.445510835913312) internal successors, (14359), 3236 states have internal predecessors, (14359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 14359 transitions. [2022-11-18 19:39:17,804 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 14359 transitions. Word has length 13 [2022-11-18 19:39:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:17,804 INFO L495 AbstractCegarLoop]: Abstraction has 3237 states and 14359 transitions. [2022-11-18 19:39:17,804 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) [2022-11-18 19:39:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 14359 transitions. [2022-11-18 19:39:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:17,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:17,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:17,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Ended with exit code 0 [2022-11-18 19:39:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:18,006 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -933156837, now seen corresponding path program 4 times [2022-11-18 19:39:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151469676] [2022-11-18 19:39:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:39:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:18,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:18,008 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:18,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Waiting until timeout for monitored process [2022-11-18 19:39:18,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:39:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:39:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:18,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:18,543 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:18,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:19,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151469676] [2022-11-18 19:39:19,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151469676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:19,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:19,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848059324] [2022-11-18 19:39:19,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:19,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:19,471 INFO L87 Difference]: Start difference. First operand 3237 states and 14359 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:19,663 INFO L93 Difference]: Finished difference Result 3375 states and 15079 transitions. [2022-11-18 19:39:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:39:19,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:19,677 INFO L225 Difference]: With dead ends: 3375 [2022-11-18 19:39:19,677 INFO L226 Difference]: Without dead ends: 3375 [2022-11-18 19:39:19,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:19,678 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:19,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-18 19:39:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-11-18 19:39:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3245. [2022-11-18 19:39:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.44935145151328) internal successors, (14407), 3244 states have internal predecessors, (14407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14407 transitions. [2022-11-18 19:39:19,775 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14407 transitions. Word has length 13 [2022-11-18 19:39:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:19,775 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14407 transitions. [2022-11-18 19:39:19,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14407 transitions. [2022-11-18 19:39:19,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:19,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:19,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:19,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Forceful destruction successful, exit code 0 [2022-11-18 19:39:19,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:19,978 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:19,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:19,978 INFO L85 PathProgramCache]: Analyzing trace with hash -933136377, now seen corresponding path program 5 times [2022-11-18 19:39:19,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:19,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77381170] [2022-11-18 19:39:19,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:39:19,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:19,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:19,980 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:19,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-18 19:39:20,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:39:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:20,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:39:20,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:20,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:20,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:21,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77381170] [2022-11-18 19:39:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77381170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:21,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725386115] [2022-11-18 19:39:21,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:21,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:21,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:21,433 INFO L87 Difference]: Start difference. First operand 3245 states and 14407 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:21,894 INFO L93 Difference]: Finished difference Result 3365 states and 15023 transitions. [2022-11-18 19:39:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:39:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:21,904 INFO L225 Difference]: With dead ends: 3365 [2022-11-18 19:39:21,904 INFO L226 Difference]: Without dead ends: 3365 [2022-11-18 19:39:21,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:21,905 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:21,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-11-18 19:39:21,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-11-18 19:39:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3245. [2022-11-18 19:39:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.448733786287832) internal successors, (14405), 3244 states have internal predecessors, (14405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14405 transitions. [2022-11-18 19:39:21,965 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14405 transitions. Word has length 13 [2022-11-18 19:39:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:21,965 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14405 transitions. [2022-11-18 19:39:21,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14405 transitions. [2022-11-18 19:39:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:21,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:21,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:21,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Ended with exit code 0 [2022-11-18 19:39:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:22,167 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash -933136191, now seen corresponding path program 2 times [2022-11-18 19:39:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975927170] [2022-11-18 19:39:22,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:39:22,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:22,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:22,168 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2022-11-18 19:39:22,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:39:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:39:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:22,717 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:22,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:23,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:23,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975927170] [2022-11-18 19:39:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975927170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:23,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:23,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:39:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983843409] [2022-11-18 19:39:23,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:23,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:39:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:39:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:39:23,593 INFO L87 Difference]: Start difference. First operand 3245 states and 14405 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:24,055 INFO L93 Difference]: Finished difference Result 3333 states and 14851 transitions. [2022-11-18 19:39:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:39:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:24,065 INFO L225 Difference]: With dead ends: 3333 [2022-11-18 19:39:24,065 INFO L226 Difference]: Without dead ends: 3333 [2022-11-18 19:39:24,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:39:24,065 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:24,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-11-18 19:39:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2022-11-18 19:39:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3245. [2022-11-18 19:39:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.448733786287832) internal successors, (14405), 3244 states have internal predecessors, (14405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14405 transitions. [2022-11-18 19:39:24,127 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14405 transitions. Word has length 13 [2022-11-18 19:39:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:24,128 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14405 transitions. [2022-11-18 19:39:24,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14405 transitions. [2022-11-18 19:39:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:24,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:24,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:24,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Forceful destruction successful, exit code 0 [2022-11-18 19:39:24,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:24,330 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:24,330 INFO L85 PathProgramCache]: Analyzing trace with hash -933135602, now seen corresponding path program 2 times [2022-11-18 19:39:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:24,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703845505] [2022-11-18 19:39:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:39:24,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:24,332 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2022-11-18 19:39:24,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:39:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:39:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:24,903 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:25,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:26,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703845505] [2022-11-18 19:39:26,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703845505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:26,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:26,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 19:39:26,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655501673] [2022-11-18 19:39:26,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:39:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:39:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:39:26,684 INFO L87 Difference]: Start difference. First operand 3245 states and 14405 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) [2022-11-18 19:39:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:35,350 INFO L93 Difference]: Finished difference Result 7042 states and 30131 transitions. [2022-11-18 19:39:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:39:35,352 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 [2022-11-18 19:39:35,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:35,374 INFO L225 Difference]: With dead ends: 7042 [2022-11-18 19:39:35,374 INFO L226 Difference]: Without dead ends: 7042 [2022-11-18 19:39:35,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=341, Invalid=991, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 19:39:35,374 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:35,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 79 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 666 Invalid, 0 Unknown, 259 Unchecked, 4.2s Time] [2022-11-18 19:39:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2022-11-18 19:39:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 3555. [2022-11-18 19:39:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3548 states have (on average 4.499154453213078) internal successors, (15963), 3554 states have internal predecessors, (15963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15963 transitions. [2022-11-18 19:39:35,492 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15963 transitions. Word has length 13 [2022-11-18 19:39:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:35,493 INFO L495 AbstractCegarLoop]: Abstraction has 3555 states and 15963 transitions. [2022-11-18 19:39:35,493 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) [2022-11-18 19:39:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15963 transitions. [2022-11-18 19:39:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:35,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:35,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:35,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Ended with exit code 0 [2022-11-18 19:39:35,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:35,695 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash -933132812, now seen corresponding path program 3 times [2022-11-18 19:39:35,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:35,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720976924] [2022-11-18 19:39:35,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:39:35,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:35,697 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:35,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2022-11-18 19:39:36,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:39:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:39:36,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:36,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:36,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:36,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:39:37,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720976924] [2022-11-18 19:39:37,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720976924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:37,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:39:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273087752] [2022-11-18 19:39:37,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:37,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:39:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:39:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:39:37,743 INFO L87 Difference]: Start difference. First operand 3555 states and 15963 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) [2022-11-18 19:39:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:46,586 INFO L93 Difference]: Finished difference Result 7085 states and 30320 transitions. [2022-11-18 19:39:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 19:39:46,587 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 [2022-11-18 19:39:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:46,607 INFO L225 Difference]: With dead ends: 7085 [2022-11-18 19:39:46,607 INFO L226 Difference]: Without dead ends: 7085 [2022-11-18 19:39:46,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=390, Invalid=870, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 19:39:46,607 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 437 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:46,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 43 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 399 Invalid, 0 Unknown, 166 Unchecked, 3.8s Time] [2022-11-18 19:39:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7085 states. [2022-11-18 19:39:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7085 to 3000. [2022-11-18 19:39:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2993 states have (on average 4.3488138990978955) internal successors, (13016), 2999 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 13016 transitions. [2022-11-18 19:39:46,693 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 13016 transitions. Word has length 13 [2022-11-18 19:39:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:46,693 INFO L495 AbstractCegarLoop]: Abstraction has 3000 states and 13016 transitions. [2022-11-18 19:39:46,693 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) [2022-11-18 19:39:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 13016 transitions. [2022-11-18 19:39:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:46,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:46,695 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:46,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Forceful destruction successful, exit code 0 [2022-11-18 19:39:46,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:46,909 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash -256592796, now seen corresponding path program 3 times [2022-11-18 19:39:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:46,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221105504] [2022-11-18 19:39:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:39:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:46,910 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:46,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2022-11-18 19:39:47,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 19:39:47,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:39:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:47,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:47,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:47,703 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 [2022-11-18 19:39:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:39:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:39:48,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:48,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221105504] [2022-11-18 19:39:48,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221105504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:48,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:48,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 19:39:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605240428] [2022-11-18 19:39:48,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:39:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:39:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:39:48,311 INFO L87 Difference]: Start difference. First operand 3000 states and 13016 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:51,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:51,557 INFO L93 Difference]: Finished difference Result 3570 states and 15056 transitions. [2022-11-18 19:39:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:39:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:39:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:51,566 INFO L225 Difference]: With dead ends: 3570 [2022-11-18 19:39:51,567 INFO L226 Difference]: Without dead ends: 3570 [2022-11-18 19:39:51,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:39:51,567 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 527 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:51,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 150 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 19:39:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-11-18 19:39:51,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 3050. [2022-11-18 19:39:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3043 states have (on average 4.351298061123891) internal successors, (13241), 3049 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 13241 transitions. [2022-11-18 19:39:51,626 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 13241 transitions. Word has length 13 [2022-11-18 19:39:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:51,626 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 13241 transitions. [2022-11-18 19:39:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 13241 transitions. [2022-11-18 19:39:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:51,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:51,628 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:51,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Ended with exit code 0 [2022-11-18 19:39:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:51,829 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 197802532, now seen corresponding path program 7 times [2022-11-18 19:39:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:51,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441476726] [2022-11-18 19:39:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:39:51,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:51,830 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:51,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Waiting until timeout for monitored process [2022-11-18 19:39:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:39:52,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:39:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:52,394 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:52,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:39:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:54,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:39:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441476726] [2022-11-18 19:39:54,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441476726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:39:54,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:39:54,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:39:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644035027] [2022-11-18 19:39:54,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:39:54,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:39:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:39:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:39:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:39:54,466 INFO L87 Difference]: Start difference. First operand 3050 states and 13241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:39:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:57,291 INFO L93 Difference]: Finished difference Result 3157 states and 13460 transitions. [2022-11-18 19:39:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:39:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 [2022-11-18 19:39:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:57,300 INFO L225 Difference]: With dead ends: 3157 [2022-11-18 19:39:57,300 INFO L226 Difference]: Without dead ends: 3157 [2022-11-18 19:39:57,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-11-18 19:39:57,300 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 292 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:57,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 109 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 90 Unchecked, 1.3s Time] [2022-11-18 19:39:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-11-18 19:39:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3052. [2022-11-18 19:39:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3045 states have (on average 4.350410509031199) internal successors, (13247), 3051 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:39:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 13247 transitions. [2022-11-18 19:39:57,355 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 13247 transitions. Word has length 13 [2022-11-18 19:39:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:39:57,355 INFO L495 AbstractCegarLoop]: Abstraction has 3052 states and 13247 transitions. [2022-11-18 19:39:57,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:39:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 13247 transitions. [2022-11-18 19:39:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:39:57,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:39:57,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:39:57,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Ended with exit code 0 [2022-11-18 19:39:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:57,559 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:39:57,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:39:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -360328222, now seen corresponding path program 8 times [2022-11-18 19:39:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:39:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693881803] [2022-11-18 19:39:57,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:39:57,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:39:57,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:39:57,561 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:39:57,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Waiting until timeout for monitored process [2022-11-18 19:39:57,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:39:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:39:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:39:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:39:58,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:39:58,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:39:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:39:58,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:00,275 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693881803] [2022-11-18 19:40:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693881803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:00,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:00,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:40:00,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270143177] [2022-11-18 19:40:00,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:40:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:40:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:40:00,277 INFO L87 Difference]: Start difference. First operand 3052 states and 13247 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:40:07,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:07,536 INFO L93 Difference]: Finished difference Result 3612 states and 14862 transitions. [2022-11-18 19:40:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:40:07,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 [2022-11-18 19:40:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:07,546 INFO L225 Difference]: With dead ends: 3612 [2022-11-18 19:40:07,546 INFO L226 Difference]: Without dead ends: 3612 [2022-11-18 19:40:07,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:40:07,547 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 271 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:07,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 155 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 744 Invalid, 0 Unknown, 151 Unchecked, 4.4s Time] [2022-11-18 19:40:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2022-11-18 19:40:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3054. [2022-11-18 19:40:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3047 states have (on average 4.349524122087299) internal successors, (13253), 3053 states have internal predecessors, (13253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 13253 transitions. [2022-11-18 19:40:07,609 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 13253 transitions. Word has length 13 [2022-11-18 19:40:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:07,610 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 13253 transitions. [2022-11-18 19:40:07,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:40:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 13253 transitions. [2022-11-18 19:40:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:40:07,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:07,612 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:07,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Ended with exit code 0 [2022-11-18 19:40:07,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:07,812 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -360184072, now seen corresponding path program 9 times [2022-11-18 19:40:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010370163] [2022-11-18 19:40:07,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:40:07,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:07,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:07,814 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:07,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Waiting until timeout for monitored process [2022-11-18 19:40:08,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:40:08,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:40:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:08,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:08,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:08,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:09,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010370163] [2022-11-18 19:40:09,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010370163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:09,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:09,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 19:40:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038569517] [2022-11-18 19:40:09,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:40:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:40:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:40:09,469 INFO L87 Difference]: Start difference. First operand 3054 states and 13253 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:15,860 INFO L93 Difference]: Finished difference Result 3461 states and 14162 transitions. [2022-11-18 19:40:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:40:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:40:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:15,869 INFO L225 Difference]: With dead ends: 3461 [2022-11-18 19:40:15,869 INFO L226 Difference]: Without dead ends: 3461 [2022-11-18 19:40:15,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:40:15,870 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 481 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:15,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 157 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 693 Invalid, 0 Unknown, 408 Unchecked, 5.3s Time] [2022-11-18 19:40:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2022-11-18 19:40:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 3066. [2022-11-18 19:40:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 3059 states have (on average 4.345537757437071) internal successors, (13293), 3065 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 13293 transitions. [2022-11-18 19:40:15,928 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 13293 transitions. Word has length 13 [2022-11-18 19:40:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:15,928 INFO L495 AbstractCegarLoop]: Abstraction has 3066 states and 13293 transitions. [2022-11-18 19:40:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 13293 transitions. [2022-11-18 19:40:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:40:15,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:15,930 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:15,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Ended with exit code 0 [2022-11-18 19:40:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:16,130 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:16,130 INFO L85 PathProgramCache]: Analyzing trace with hash -355715422, now seen corresponding path program 10 times [2022-11-18 19:40:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921786462] [2022-11-18 19:40:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:40:16,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:16,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:16,132 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:16,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Waiting until timeout for monitored process [2022-11-18 19:40:16,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:40:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:40:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:16,705 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:16,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:17,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:18,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921786462] [2022-11-18 19:40:18,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921786462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:18,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:18,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:40:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128434475] [2022-11-18 19:40:18,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:40:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:40:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:40:18,895 INFO L87 Difference]: Start difference. First operand 3066 states and 13293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:40:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:27,481 INFO L93 Difference]: Finished difference Result 3737 states and 15067 transitions. [2022-11-18 19:40:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:40:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 [2022-11-18 19:40:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:27,495 INFO L225 Difference]: With dead ends: 3737 [2022-11-18 19:40:27,495 INFO L226 Difference]: Without dead ends: 3737 [2022-11-18 19:40:27,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:40:27,496 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 317 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:27,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 191 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 813 Invalid, 0 Unknown, 407 Unchecked, 5.3s Time] [2022-11-18 19:40:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-11-18 19:40:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3086. [2022-11-18 19:40:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3079 states have (on average 4.343293277038) internal successors, (13373), 3085 states have internal predecessors, (13373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 13373 transitions. [2022-11-18 19:40:27,565 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 13373 transitions. Word has length 13 [2022-11-18 19:40:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:27,566 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 13373 transitions. [2022-11-18 19:40:27,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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) [2022-11-18 19:40:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 13373 transitions. [2022-11-18 19:40:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:40:27,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:27,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:27,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Ended with exit code 0 [2022-11-18 19:40:27,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:27,768 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1287675897, now seen corresponding path program 4 times [2022-11-18 19:40:27,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:27,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268853685] [2022-11-18 19:40:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:40:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:27,770 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:27,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Waiting until timeout for monitored process [2022-11-18 19:40:28,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:40:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:40:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:28,383 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:28,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:40:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:40:29,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:29,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268853685] [2022-11-18 19:40:29,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268853685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:29,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:29,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:40:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373888964] [2022-11-18 19:40:29,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:40:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:40:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:40:29,954 INFO L87 Difference]: Start difference. First operand 3086 states and 13373 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-11-18 19:40:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:31,632 INFO L93 Difference]: Finished difference Result 3102 states and 13437 transitions. [2022-11-18 19:40:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:40:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 [2022-11-18 19:40:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:31,641 INFO L225 Difference]: With dead ends: 3102 [2022-11-18 19:40:31,641 INFO L226 Difference]: Without dead ends: 3102 [2022-11-18 19:40:31,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:40:31,641 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:31,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 43 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 12 Unchecked, 0.9s Time] [2022-11-18 19:40:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-11-18 19:40:31,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 3102. [2022-11-18 19:40:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3095 states have (on average 4.341518578352181) internal successors, (13437), 3101 states have internal predecessors, (13437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 13437 transitions. [2022-11-18 19:40:31,730 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 13437 transitions. Word has length 13 [2022-11-18 19:40:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:31,731 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 13437 transitions. [2022-11-18 19:40:31,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) [2022-11-18 19:40:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 13437 transitions. [2022-11-18 19:40:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:40:31,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:31,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-18 19:40:31,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Ended with exit code 0 [2022-11-18 19:40:31,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:31,934 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1728358354, now seen corresponding path program 3 times [2022-11-18 19:40:31,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:31,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626485886] [2022-11-18 19:40:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:40:31,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:31,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:31,936 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:31,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Waiting until timeout for monitored process [2022-11-18 19:40:32,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:40:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:40:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:32,588 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 19:40:32,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 19:40:34,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:34,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626485886] [2022-11-18 19:40:34,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626485886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:34,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:34,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 19:40:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83678995] [2022-11-18 19:40:34,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:40:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:40:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:40:34,340 INFO L87 Difference]: Start difference. First operand 3102 states and 13437 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) [2022-11-18 19:40:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:44,748 INFO L93 Difference]: Finished difference Result 6854 states and 30022 transitions. [2022-11-18 19:40:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:40:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:40:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:44,767 INFO L225 Difference]: With dead ends: 6854 [2022-11-18 19:40:44,767 INFO L226 Difference]: Without dead ends: 6854 [2022-11-18 19:40:44,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:40:44,768 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 906 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:44,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 71 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-18 19:40:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2022-11-18 19:40:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 4024. [2022-11-18 19:40:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4017 states have (on average 4.554642768235001) internal successors, (18296), 4023 states have internal predecessors, (18296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 18296 transitions. [2022-11-18 19:40:44,880 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 18296 transitions. Word has length 13 [2022-11-18 19:40:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:44,880 INFO L495 AbstractCegarLoop]: Abstraction has 4024 states and 18296 transitions. [2022-11-18 19:40:44,880 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) [2022-11-18 19:40:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 18296 transitions. [2022-11-18 19:40:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 19:40:44,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:44,883 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:44,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Ended with exit code 0 [2022-11-18 19:40:45,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:45,083 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash -158609518, now seen corresponding path program 2 times [2022-11-18 19:40:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:45,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577116363] [2022-11-18 19:40:45,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:40:45,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:45,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:45,085 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:45,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Waiting until timeout for monitored process [2022-11-18 19:40:45,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:40:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:40:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:45,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:40:45,615 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-18 19:40:45,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-18 19:40:45,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 19:40:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 19:40:45,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:40:45,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577116363] [2022-11-18 19:40:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577116363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:40:45,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:40:45,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:40:45,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789018424] [2022-11-18 19:40:45,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:40:45,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:40:45,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:40:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:40:45,890 INFO L87 Difference]: Start difference. First operand 4024 states and 18296 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:46,265 INFO L93 Difference]: Finished difference Result 4080 states and 18427 transitions. [2022-11-18 19:40:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:40:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 19:40:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:46,278 INFO L225 Difference]: With dead ends: 4080 [2022-11-18 19:40:46,278 INFO L226 Difference]: Without dead ends: 4080 [2022-11-18 19:40:46,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:40:46,278 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:46,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 7 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:40:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2022-11-18 19:40:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3997. [2022-11-18 19:40:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3992 states have (on average 4.565380761523046) internal successors, (18225), 3996 states have internal predecessors, (18225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 18225 transitions. [2022-11-18 19:40:46,372 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 18225 transitions. Word has length 13 [2022-11-18 19:40:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:46,372 INFO L495 AbstractCegarLoop]: Abstraction has 3997 states and 18225 transitions. [2022-11-18 19:40:46,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 18225 transitions. [2022-11-18 19:40:46,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:40:46,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:46,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:46,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Ended with exit code 0 [2022-11-18 19:40:46,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:46,575 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 930693859, now seen corresponding path program 6 times [2022-11-18 19:40:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:46,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831479382] [2022-11-18 19:40:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:40:46,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:46,577 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Waiting until timeout for monitored process [2022-11-18 19:40:47,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:40:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:47,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:40:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:47,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:47,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:48,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831479382] [2022-11-18 19:40:48,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831479382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:48,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:48,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:40:48,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200200927] [2022-11-18 19:40:48,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:48,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:40:48,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:40:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:40:48,554 INFO L87 Difference]: Start difference. First operand 3997 states and 18225 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-11-18 19:40:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:49,608 INFO L93 Difference]: Finished difference Result 4076 states and 18484 transitions. [2022-11-18 19:40:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:40:49,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-18 19:40:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:49,620 INFO L225 Difference]: With dead ends: 4076 [2022-11-18 19:40:49,620 INFO L226 Difference]: Without dead ends: 4076 [2022-11-18 19:40:49,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:40:49,621 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:49,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 82 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-11-18 19:40:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-11-18 19:40:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 4011. [2022-11-18 19:40:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 4006 states have (on average 4.565401897154269) internal successors, (18289), 4010 states have internal predecessors, (18289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 18289 transitions. [2022-11-18 19:40:49,696 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 18289 transitions. Word has length 14 [2022-11-18 19:40:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:49,696 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 18289 transitions. [2022-11-18 19:40:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-11-18 19:40:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 18289 transitions. [2022-11-18 19:40:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:40:49,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:49,698 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:49,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Ended with exit code 0 [2022-11-18 19:40:49,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:49,899 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash 950355919, now seen corresponding path program 7 times [2022-11-18 19:40:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:49,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878846610] [2022-11-18 19:40:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:40:49,900 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 [2022-11-18 19:40:49,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:49,901 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Waiting until timeout for monitored process [2022-11-18 19:40:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:40:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:50,545 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:50,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:50,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:52,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:52,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878846610] [2022-11-18 19:40:52,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878846610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:52,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:52,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:40:52,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356427880] [2022-11-18 19:40:52,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:52,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:40:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:40:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:40:52,040 INFO L87 Difference]: Start difference. First operand 4011 states and 18289 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-11-18 19:40:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:40:53,567 INFO L93 Difference]: Finished difference Result 4064 states and 18436 transitions. [2022-11-18 19:40:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:40:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 [2022-11-18 19:40:53,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:40:53,579 INFO L225 Difference]: With dead ends: 4064 [2022-11-18 19:40:53,579 INFO L226 Difference]: Without dead ends: 4064 [2022-11-18 19:40:53,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:40:53,579 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:40:53,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 81 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 78 Unchecked, 1.0s Time] [2022-11-18 19:40:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-11-18 19:40:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4007. [2022-11-18 19:40:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4002 states have (on average 4.566466766616692) internal successors, (18275), 4006 states have internal predecessors, (18275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 18275 transitions. [2022-11-18 19:40:53,659 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 18275 transitions. Word has length 14 [2022-11-18 19:40:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:53,659 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 18275 transitions. [2022-11-18 19:40:53,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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) [2022-11-18 19:40:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 18275 transitions. [2022-11-18 19:40:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:40:53,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:53,662 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:53,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Ended with exit code 0 [2022-11-18 19:40:53,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:53,862 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:40:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash 640786369, now seen corresponding path program 4 times [2022-11-18 19:40:53,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:40:53,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281267533] [2022-11-18 19:40:53,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:40:53,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:40:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:40:53,864 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:40:53,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Waiting until timeout for monitored process [2022-11-18 19:40:54,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:40:54,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:40:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:40:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:54,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:40:54,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:40:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:54,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:56,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:40:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281267533] [2022-11-18 19:40:56,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281267533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:56,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:40:56,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:40:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586982457] [2022-11-18 19:40:56,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:40:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:40:56,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:40:56,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:40:56,772 INFO L87 Difference]: Start difference. First operand 4007 states and 18275 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:41:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:05,144 INFO L93 Difference]: Finished difference Result 4513 states and 19591 transitions. [2022-11-18 19:41:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:41:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-18 19:41:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:05,158 INFO L225 Difference]: With dead ends: 4513 [2022-11-18 19:41:05,159 INFO L226 Difference]: Without dead ends: 4513 [2022-11-18 19:41:05,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:41:05,159 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 373 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:05,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 198 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 745 Invalid, 0 Unknown, 535 Unchecked, 4.9s Time] [2022-11-18 19:41:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2022-11-18 19:41:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 4018. [2022-11-18 19:41:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4013 states have (on average 4.5639172688761525) internal successors, (18315), 4017 states have internal predecessors, (18315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 18315 transitions. [2022-11-18 19:41:05,258 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 18315 transitions. Word has length 14 [2022-11-18 19:41:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:05,259 INFO L495 AbstractCegarLoop]: Abstraction has 4018 states and 18315 transitions. [2022-11-18 19:41:05,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:41:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 18315 transitions. [2022-11-18 19:41:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:05,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:05,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:05,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Forceful destruction successful, exit code 0 [2022-11-18 19:41:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:05,462 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 640786431, now seen corresponding path program 5 times [2022-11-18 19:41:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513769758] [2022-11-18 19:41:05,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:41:05,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:05,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:05,464 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:05,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Waiting until timeout for monitored process [2022-11-18 19:41:06,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:41:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:06,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:06,313 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:06,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:06,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:07,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:07,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513769758] [2022-11-18 19:41:07,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513769758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:07,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:07,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:41:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157256378] [2022-11-18 19:41:07,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:07,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:41:07,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:41:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:41:07,955 INFO L87 Difference]: Start difference. First operand 4018 states and 18315 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:09,424 INFO L93 Difference]: Finished difference Result 4084 states and 18637 transitions. [2022-11-18 19:41:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:41:09,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:09,439 INFO L225 Difference]: With dead ends: 4084 [2022-11-18 19:41:09,439 INFO L226 Difference]: Without dead ends: 4084 [2022-11-18 19:41:09,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:41:09,440 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:09,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 30 Unchecked, 0.9s Time] [2022-11-18 19:41:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-11-18 19:41:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 4072. [2022-11-18 19:41:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4067 states have (on average 4.568723875092205) internal successors, (18581), 4071 states have internal predecessors, (18581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 18581 transitions. [2022-11-18 19:41:09,529 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 18581 transitions. Word has length 14 [2022-11-18 19:41:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:09,529 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 18581 transitions. [2022-11-18 19:41:09,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 18581 transitions. [2022-11-18 19:41:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:09,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:09,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:09,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Ended with exit code 0 [2022-11-18 19:41:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:09,733 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 640788291, now seen corresponding path program 6 times [2022-11-18 19:41:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423194887] [2022-11-18 19:41:09,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:41:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:09,735 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:09,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Waiting until timeout for monitored process [2022-11-18 19:41:10,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:41:10,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:10,396 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:10,396 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:10,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:12,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423194887] [2022-11-18 19:41:12,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423194887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:12,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:12,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:41:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819935153] [2022-11-18 19:41:12,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:41:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:41:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:41:12,644 INFO L87 Difference]: Start difference. First operand 4072 states and 18581 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:14,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:14,105 INFO L93 Difference]: Finished difference Result 4198 states and 19137 transitions. [2022-11-18 19:41:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:41:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:14,120 INFO L225 Difference]: With dead ends: 4198 [2022-11-18 19:41:14,120 INFO L226 Difference]: Without dead ends: 4198 [2022-11-18 19:41:14,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-11-18 19:41:14,120 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:14,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-11-18 19:41:14,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2022-11-18 19:41:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 4116. [2022-11-18 19:41:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.570907321819509) internal successors, (18791), 4115 states have internal predecessors, (18791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 18791 transitions. [2022-11-18 19:41:14,239 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 18791 transitions. Word has length 14 [2022-11-18 19:41:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 4116 states and 18791 transitions. [2022-11-18 19:41:14,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 18791 transitions. [2022-11-18 19:41:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:14,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:14,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:14,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Ended with exit code 0 [2022-11-18 19:41:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:14,442 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:14,443 INFO L85 PathProgramCache]: Analyzing trace with hash 640845951, now seen corresponding path program 7 times [2022-11-18 19:41:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:14,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165488052] [2022-11-18 19:41:14,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:41:14,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:14,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:14,444 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:14,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Waiting until timeout for monitored process [2022-11-18 19:41:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:41:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:15,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:15,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:15,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:17,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165488052] [2022-11-18 19:41:17,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165488052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:17,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:17,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:41:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622118265] [2022-11-18 19:41:17,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:17,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:41:17,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:41:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:41:17,220 INFO L87 Difference]: Start difference. First operand 4116 states and 18791 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:25,223 INFO L93 Difference]: Finished difference Result 7979 states and 36517 transitions. [2022-11-18 19:41:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:41:25,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:25,253 INFO L225 Difference]: With dead ends: 7979 [2022-11-18 19:41:25,253 INFO L226 Difference]: Without dead ends: 7979 [2022-11-18 19:41:25,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:41:25,253 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 198 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:25,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 23 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 0 Unknown, 305 Unchecked, 4.3s Time] [2022-11-18 19:41:25,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-11-18 19:41:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 5148. [2022-11-18 19:41:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5143 states have (on average 4.725646509819172) internal successors, (24304), 5147 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 24304 transitions. [2022-11-18 19:41:25,397 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 24304 transitions. Word has length 14 [2022-11-18 19:41:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:25,397 INFO L495 AbstractCegarLoop]: Abstraction has 5148 states and 24304 transitions. [2022-11-18 19:41:25,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 24304 transitions. [2022-11-18 19:41:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:25,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:25,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:25,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Ended with exit code 0 [2022-11-18 19:41:25,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:25,601 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash 677656343, now seen corresponding path program 8 times [2022-11-18 19:41:25,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:25,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217126254] [2022-11-18 19:41:25,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:41:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:25,603 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:25,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Waiting until timeout for monitored process [2022-11-18 19:41:26,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:41:26,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:26,339 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:26,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:26,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:28,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217126254] [2022-11-18 19:41:28,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217126254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:28,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:28,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:41:28,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314238814] [2022-11-18 19:41:28,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:28,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:41:28,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:41:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:41:28,525 INFO L87 Difference]: Start difference. First operand 5148 states and 24304 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:37,994 INFO L93 Difference]: Finished difference Result 9840 states and 46037 transitions. [2022-11-18 19:41:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 19:41:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:38,031 INFO L225 Difference]: With dead ends: 9840 [2022-11-18 19:41:38,032 INFO L226 Difference]: Without dead ends: 9840 [2022-11-18 19:41:38,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:41:38,032 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 31 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 537 Invalid, 0 Unknown, 328 Unchecked, 5.0s Time] [2022-11-18 19:41:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9840 states. [2022-11-18 19:41:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9840 to 6005. [2022-11-18 19:41:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6000 states have (on average 4.796833333333334) internal successors, (28781), 6004 states have internal predecessors, (28781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 28781 transitions. [2022-11-18 19:41:38,271 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 28781 transitions. Word has length 14 [2022-11-18 19:41:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:38,271 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 28781 transitions. [2022-11-18 19:41:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 28781 transitions. [2022-11-18 19:41:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:38,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:38,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:38,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Ended with exit code 0 [2022-11-18 19:41:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:38,475 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 677714003, now seen corresponding path program 9 times [2022-11-18 19:41:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189991276] [2022-11-18 19:41:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:41:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:38,477 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:38,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Waiting until timeout for monitored process [2022-11-18 19:41:39,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:41:39,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:39,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:39,184 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:39,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:41,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189991276] [2022-11-18 19:41:41,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189991276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:41,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:41,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:41:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233299988] [2022-11-18 19:41:41,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:41:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:41:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:41:41,336 INFO L87 Difference]: Start difference. First operand 6005 states and 28781 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:49,900 INFO L93 Difference]: Finished difference Result 10396 states and 48742 transitions. [2022-11-18 19:41:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:41:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:49,940 INFO L225 Difference]: With dead ends: 10396 [2022-11-18 19:41:49,941 INFO L226 Difference]: Without dead ends: 10396 [2022-11-18 19:41:49,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:41:49,941 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 146 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:49,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 34 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 540 Invalid, 0 Unknown, 469 Unchecked, 4.6s Time] [2022-11-18 19:41:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2022-11-18 19:41:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 6329. [2022-11-18 19:41:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6324 states have (on average 4.851043643263757) internal successors, (30678), 6328 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 30678 transitions. [2022-11-18 19:41:50,215 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 30678 transitions. Word has length 14 [2022-11-18 19:41:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:50,215 INFO L495 AbstractCegarLoop]: Abstraction has 6329 states and 30678 transitions. [2022-11-18 19:41:50,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 30678 transitions. [2022-11-18 19:41:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:50,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:50,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:50,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Forceful destruction successful, exit code 0 [2022-11-18 19:41:50,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:50,419 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1942247213, now seen corresponding path program 10 times [2022-11-18 19:41:50,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:50,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147035309] [2022-11-18 19:41:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:41:50,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:50,421 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:50,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Waiting until timeout for monitored process [2022-11-18 19:41:50,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:41:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:41:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:51,075 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:51,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:51,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:52,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:52,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147035309] [2022-11-18 19:41:52,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147035309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:52,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:52,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:41:52,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808788681] [2022-11-18 19:41:52,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:41:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:41:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:41:52,551 INFO L87 Difference]: Start difference. First operand 6329 states and 30678 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:54,034 INFO L93 Difference]: Finished difference Result 6420 states and 31115 transitions. [2022-11-18 19:41:54,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:41:54,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:54,057 INFO L225 Difference]: With dead ends: 6420 [2022-11-18 19:41:54,058 INFO L226 Difference]: Without dead ends: 6420 [2022-11-18 19:41:54,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:41:54,058 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:54,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 68 Unchecked, 1.0s Time] [2022-11-18 19:41:54,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2022-11-18 19:41:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 6393. [2022-11-18 19:41:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6388 states have (on average 4.851283656856606) internal successors, (30990), 6392 states have internal predecessors, (30990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 30990 transitions. [2022-11-18 19:41:54,212 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 30990 transitions. Word has length 14 [2022-11-18 19:41:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:54,212 INFO L495 AbstractCegarLoop]: Abstraction has 6393 states and 30990 transitions. [2022-11-18 19:41:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 30990 transitions. [2022-11-18 19:41:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:54,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:54,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:54,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Ended with exit code 0 [2022-11-18 19:41:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:54,417 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1406872115, now seen corresponding path program 11 times [2022-11-18 19:41:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:54,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487403240] [2022-11-18 19:41:54,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:41:54,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:54,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:54,418 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:54,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Waiting until timeout for monitored process [2022-11-18 19:41:54,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:41:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:55,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:55,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:56,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:41:56,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487403240] [2022-11-18 19:41:56,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487403240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:56,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:41:56,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:41:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364024359] [2022-11-18 19:41:56,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:41:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:41:56,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:41:56,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:41:56,859 INFO L87 Difference]: Start difference. First operand 6393 states and 30990 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:58,293 INFO L93 Difference]: Finished difference Result 6591 states and 31979 transitions. [2022-11-18 19:41:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:41:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:41:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:58,325 INFO L225 Difference]: With dead ends: 6591 [2022-11-18 19:41:58,325 INFO L226 Difference]: Without dead ends: 6591 [2022-11-18 19:41:58,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:41:58,326 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:58,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 18 Unchecked, 0.9s Time] [2022-11-18 19:41:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6591 states. [2022-11-18 19:41:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6591 to 6455. [2022-11-18 19:41:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6450 states have (on average 4.853798449612403) internal successors, (31307), 6454 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 31307 transitions. [2022-11-18 19:41:58,547 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 31307 transitions. Word has length 14 [2022-11-18 19:41:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:58,547 INFO L495 AbstractCegarLoop]: Abstraction has 6455 states and 31307 transitions. [2022-11-18 19:41:58,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 31307 transitions. [2022-11-18 19:41:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:41:58,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:58,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:58,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Forceful destruction successful, exit code 0 [2022-11-18 19:41:58,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:58,752 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:41:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1406929775, now seen corresponding path program 12 times [2022-11-18 19:41:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:41:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17338096] [2022-11-18 19:41:58,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:41:58,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:41:58,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:41:58,755 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:41:58,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Waiting until timeout for monitored process [2022-11-18 19:41:59,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:41:59,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:41:59,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:59,383 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:41:59,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:41:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:41:59,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:42:01,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:42:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17338096] [2022-11-18 19:42:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17338096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:01,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:42:01,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:42:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511782308] [2022-11-18 19:42:01,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:01,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:42:01,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:42:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:42:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:42:01,440 INFO L87 Difference]: Start difference. First operand 6455 states and 31307 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:42:10,943 INFO L93 Difference]: Finished difference Result 11035 states and 52340 transitions. [2022-11-18 19:42:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 19:42:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:42:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:42:10,981 INFO L225 Difference]: With dead ends: 11035 [2022-11-18 19:42:10,981 INFO L226 Difference]: Without dead ends: 11035 [2022-11-18 19:42:10,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-11-18 19:42:10,982 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:42:10,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 614 Invalid, 0 Unknown, 366 Unchecked, 5.5s Time] [2022-11-18 19:42:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2022-11-18 19:42:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 7182. [2022-11-18 19:42:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7177 states have (on average 4.928382332450885) internal successors, (35371), 7181 states have internal predecessors, (35371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 35371 transitions. [2022-11-18 19:42:11,250 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 35371 transitions. Word has length 14 [2022-11-18 19:42:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:42:11,250 INFO L495 AbstractCegarLoop]: Abstraction has 7182 states and 35371 transitions. [2022-11-18 19:42:11,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 35371 transitions. [2022-11-18 19:42:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:42:11,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:42:11,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:11,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Ended with exit code 0 [2022-11-18 19:42:11,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:11,455 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:42:11,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:11,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1153043727, now seen corresponding path program 13 times [2022-11-18 19:42:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:42:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669510588] [2022-11-18 19:42:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:42:11,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:11,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:42:11,457 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:42:11,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Waiting until timeout for monitored process [2022-11-18 19:42:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:42:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:12,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:42:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:42:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:42:12,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:42:14,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:42:14,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669510588] [2022-11-18 19:42:14,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669510588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:14,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:42:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:42:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601083312] [2022-11-18 19:42:14,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:14,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:42:14,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:42:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:42:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:42:14,372 INFO L87 Difference]: Start difference. First operand 7182 states and 35371 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:42:28,216 INFO L93 Difference]: Finished difference Result 12234 states and 58634 transitions. [2022-11-18 19:42:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 19:42:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:42:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:42:28,269 INFO L225 Difference]: With dead ends: 12234 [2022-11-18 19:42:28,269 INFO L226 Difference]: Without dead ends: 12234 [2022-11-18 19:42:28,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 19:42:28,270 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 191 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1219 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:42:28,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 35 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 669 Invalid, 0 Unknown, 1219 Unchecked, 6.7s Time] [2022-11-18 19:42:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2022-11-18 19:42:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 7269. [2022-11-18 19:42:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7264 states have (on average 4.924697136563877) internal successors, (35773), 7268 states have internal predecessors, (35773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 35773 transitions. [2022-11-18 19:42:28,555 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 35773 transitions. Word has length 14 [2022-11-18 19:42:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:42:28,556 INFO L495 AbstractCegarLoop]: Abstraction has 7269 states and 35773 transitions. [2022-11-18 19:42:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 35773 transitions. [2022-11-18 19:42:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:42:28,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:42:28,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Forceful destruction successful, exit code 0 [2022-11-18 19:42:28,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:28,761 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:42:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -445209281, now seen corresponding path program 14 times [2022-11-18 19:42:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:42:28,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680705277] [2022-11-18 19:42:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:42:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:42:28,763 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:42:28,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Waiting until timeout for monitored process [2022-11-18 19:42:29,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:42:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:42:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:42:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:29,475 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:42:29,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:42:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:42:30,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:42:31,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:42:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680705277] [2022-11-18 19:42:31,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680705277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:31,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:42:31,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:42:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61827035] [2022-11-18 19:42:31,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:42:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:42:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:42:31,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:42:31,703 INFO L87 Difference]: Start difference. First operand 7269 states and 35773 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:42:39,114 INFO L93 Difference]: Finished difference Result 9963 states and 48894 transitions. [2022-11-18 19:42:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 19:42:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 19:42:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:42:39,154 INFO L225 Difference]: With dead ends: 9963 [2022-11-18 19:42:39,154 INFO L226 Difference]: Without dead ends: 9963 [2022-11-18 19:42:39,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:42:39,154 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:42:39,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 37 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 475 Invalid, 0 Unknown, 707 Unchecked, 4.4s Time] [2022-11-18 19:42:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9963 states. [2022-11-18 19:42:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9963 to 7239. [2022-11-18 19:42:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7239 states, 7234 states have (on average 4.92632015482444) internal successors, (35637), 7238 states have internal predecessors, (35637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 35637 transitions. [2022-11-18 19:42:39,475 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 35637 transitions. Word has length 14 [2022-11-18 19:42:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:42:39,475 INFO L495 AbstractCegarLoop]: Abstraction has 7239 states and 35637 transitions. [2022-11-18 19:42:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 35637 transitions. [2022-11-18 19:42:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:42:39,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:42:39,480 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:39,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Ended with exit code 0 [2022-11-18 19:42:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:39,681 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:42:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1842064659, now seen corresponding path program 5 times [2022-11-18 19:42:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:42:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923807485] [2022-11-18 19:42:39,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:42:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:39,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:42:39,682 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:42:39,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Waiting until timeout for monitored process [2022-11-18 19:42:40,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:42:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:42:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:42:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:40,328 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:42:40,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:42:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:40,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:42,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:42:42,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923807485] [2022-11-18 19:42:42,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923807485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:42,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:42:42,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:42:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817497598] [2022-11-18 19:42:42,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:42,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:42:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:42:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:42:42,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:42:42,556 INFO L87 Difference]: Start difference. First operand 7239 states and 35637 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:42:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:42:58,688 INFO L93 Difference]: Finished difference Result 14274 states and 70412 transitions. [2022-11-18 19:42:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 19:42:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-18 19:42:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:42:58,749 INFO L225 Difference]: With dead ends: 14274 [2022-11-18 19:42:58,749 INFO L226 Difference]: Without dead ends: 14274 [2022-11-18 19:42:58,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 19:42:58,750 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 421 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:42:58,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 223 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1066 Invalid, 0 Unknown, 147 Unchecked, 7.8s Time] [2022-11-18 19:42:58,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-11-18 19:42:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 10704. [2022-11-18 19:42:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10704 states, 10699 states have (on average 5.07075427610057) internal successors, (54252), 10703 states have internal predecessors, (54252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10704 states to 10704 states and 54252 transitions. [2022-11-18 19:42:59,149 INFO L78 Accepts]: Start accepts. Automaton has 10704 states and 54252 transitions. Word has length 14 [2022-11-18 19:42:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:42:59,150 INFO L495 AbstractCegarLoop]: Abstraction has 10704 states and 54252 transitions. [2022-11-18 19:42:59,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:42:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10704 states and 54252 transitions. [2022-11-18 19:42:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:42:59,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:42:59,154 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:59,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Ended with exit code 0 [2022-11-18 19:42:59,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:59,355 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:42:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1836776707, now seen corresponding path program 6 times [2022-11-18 19:42:59,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:42:59,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642854686] [2022-11-18 19:42:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:42:59,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:42:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:42:59,356 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:42:59,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Waiting until timeout for monitored process [2022-11-18 19:42:59,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 19:42:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:42:59,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:42:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:00,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:00,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:02,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:02,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642854686] [2022-11-18 19:43:02,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642854686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:02,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:02,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:43:02,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922584010] [2022-11-18 19:43:02,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:02,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:43:02,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:02,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:43:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:02,555 INFO L87 Difference]: Start difference. First operand 10704 states and 54252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:11,246 INFO L93 Difference]: Finished difference Result 11097 states and 55306 transitions. [2022-11-18 19:43:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:43:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-18 19:43:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:11,279 INFO L225 Difference]: With dead ends: 11097 [2022-11-18 19:43:11,280 INFO L226 Difference]: Without dead ends: 11097 [2022-11-18 19:43:11,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:43:11,280 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 265 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:11,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 169 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 784 Invalid, 0 Unknown, 184 Unchecked, 5.1s Time] [2022-11-18 19:43:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11097 states. [2022-11-18 19:43:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11097 to 10708. [2022-11-18 19:43:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10708 states, 10703 states have (on average 5.070540969821545) internal successors, (54270), 10707 states have internal predecessors, (54270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10708 states to 10708 states and 54270 transitions. [2022-11-18 19:43:11,568 INFO L78 Accepts]: Start accepts. Automaton has 10708 states and 54270 transitions. Word has length 14 [2022-11-18 19:43:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:11,568 INFO L495 AbstractCegarLoop]: Abstraction has 10708 states and 54270 transitions. [2022-11-18 19:43:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10708 states and 54270 transitions. [2022-11-18 19:43:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:11,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:11,572 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:11,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:11,773 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1832654017, now seen corresponding path program 7 times [2022-11-18 19:43:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:11,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732262323] [2022-11-18 19:43:11,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:43:11,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:11,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:11,775 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Waiting until timeout for monitored process [2022-11-18 19:43:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:12,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:12,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:14,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:14,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732262323] [2022-11-18 19:43:14,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732262323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:14,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:14,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:43:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301320790] [2022-11-18 19:43:14,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:43:14,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:43:14,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:14,722 INFO L87 Difference]: Start difference. First operand 10708 states and 54270 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:23,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:23,104 INFO L93 Difference]: Finished difference Result 11119 states and 55388 transitions. [2022-11-18 19:43:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 19:43:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-18 19:43:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:23,144 INFO L225 Difference]: With dead ends: 11119 [2022-11-18 19:43:23,144 INFO L226 Difference]: Without dead ends: 11119 [2022-11-18 19:43:23,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:43:23,144 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 373 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:23,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 178 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 775 Invalid, 0 Unknown, 174 Unchecked, 4.9s Time] [2022-11-18 19:43:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-11-18 19:43:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 10718. [2022-11-18 19:43:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10718 states, 10713 states have (on average 5.069541678334733) internal successors, (54310), 10717 states have internal predecessors, (54310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10718 states to 10718 states and 54310 transitions. [2022-11-18 19:43:23,429 INFO L78 Accepts]: Start accepts. Automaton has 10718 states and 54310 transitions. Word has length 14 [2022-11-18 19:43:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:23,429 INFO L495 AbstractCegarLoop]: Abstraction has 10718 states and 54310 transitions. [2022-11-18 19:43:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10718 states and 54310 transitions. [2022-11-18 19:43:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:23,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:23,433 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:23,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:23,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:23,634 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1704850627, now seen corresponding path program 8 times [2022-11-18 19:43:23,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:23,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627065354] [2022-11-18 19:43:23,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:43:23,635 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 [2022-11-18 19:43:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:23,636 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:23,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Waiting until timeout for monitored process [2022-11-18 19:43:24,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:43:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:24,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:24,360 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:24,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:24,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:26,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627065354] [2022-11-18 19:43:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627065354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:26,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:26,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:43:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807865833] [2022-11-18 19:43:26,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:43:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:43:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:26,800 INFO L87 Difference]: Start difference. First operand 10718 states and 54310 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:30,741 INFO L93 Difference]: Finished difference Result 11019 states and 55278 transitions. [2022-11-18 19:43:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:43:30,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-11-18 19:43:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:30,787 INFO L225 Difference]: With dead ends: 11019 [2022-11-18 19:43:30,787 INFO L226 Difference]: Without dead ends: 11019 [2022-11-18 19:43:30,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:43:30,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:30,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 199 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 351 Invalid, 0 Unknown, 202 Unchecked, 2.0s Time] [2022-11-18 19:43:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11019 states. [2022-11-18 19:43:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11019 to 10738. [2022-11-18 19:43:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10738 states, 10733 states have (on average 5.067921364017516) internal successors, (54394), 10737 states have internal predecessors, (54394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 54394 transitions. [2022-11-18 19:43:31,146 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 54394 transitions. Word has length 14 [2022-11-18 19:43:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:31,146 INFO L495 AbstractCegarLoop]: Abstraction has 10738 states and 54394 transitions. [2022-11-18 19:43:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-18 19:43:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 54394 transitions. [2022-11-18 19:43:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:31,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:31,150 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:31,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Ended with exit code 0 [2022-11-18 19:43:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:31,351 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1725663237, now seen corresponding path program 9 times [2022-11-18 19:43:31,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136530154] [2022-11-18 19:43:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:43:31,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:31,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:31,353 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:31,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Waiting until timeout for monitored process [2022-11-18 19:43:31,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:43:31,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:43:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:32,158 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:32,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:33,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136530154] [2022-11-18 19:43:33,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136530154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:33,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:33,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 19:43:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524184709] [2022-11-18 19:43:33,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:43:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:43:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:43:33,351 INFO L87 Difference]: Start difference. First operand 10738 states and 54394 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:38,655 INFO L93 Difference]: Finished difference Result 11670 states and 57088 transitions. [2022-11-18 19:43:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 19:43:38,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2022-11-18 19:43:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:38,704 INFO L225 Difference]: With dead ends: 11670 [2022-11-18 19:43:38,704 INFO L226 Difference]: Without dead ends: 11670 [2022-11-18 19:43:38,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:43:38,704 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 246 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:38,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 184 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 725 Invalid, 0 Unknown, 284 Unchecked, 4.0s Time] [2022-11-18 19:43:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11670 states. [2022-11-18 19:43:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11670 to 10814. [2022-11-18 19:43:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10809 states have (on average 5.062262929040615) internal successors, (54718), 10813 states have internal predecessors, (54718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 54718 transitions. [2022-11-18 19:43:39,120 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 54718 transitions. Word has length 14 [2022-11-18 19:43:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:39,120 INFO L495 AbstractCegarLoop]: Abstraction has 10814 states and 54718 transitions. [2022-11-18 19:43:39,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 54718 transitions. [2022-11-18 19:43:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:39,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:39,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:39,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:39,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:39,326 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:39,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash -705108650, now seen corresponding path program 11 times [2022-11-18 19:43:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:39,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882402668] [2022-11-18 19:43:39,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:43:39,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:39,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:39,328 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:39,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Waiting until timeout for monitored process [2022-11-18 19:43:39,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:43:39,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:39,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:39,986 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:39,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:41,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882402668] [2022-11-18 19:43:41,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882402668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:41,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:41,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:43:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664532196] [2022-11-18 19:43:41,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:43:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:43:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:41,315 INFO L87 Difference]: Start difference. First operand 10814 states and 54718 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) [2022-11-18 19:43:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:42,658 INFO L93 Difference]: Finished difference Result 10850 states and 54864 transitions. [2022-11-18 19:43:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:43:42,660 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 14 [2022-11-18 19:43:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:42,703 INFO L225 Difference]: With dead ends: 10850 [2022-11-18 19:43:42,704 INFO L226 Difference]: Without dead ends: 10850 [2022-11-18 19:43:42,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:42,704 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:42,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 37 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 25 Unchecked, 0.7s Time] [2022-11-18 19:43:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2022-11-18 19:43:42,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10838. [2022-11-18 19:43:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10838 states, 10833 states have (on average 5.059909535678021) internal successors, (54814), 10837 states have internal predecessors, (54814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 54814 transitions. [2022-11-18 19:43:43,042 INFO L78 Accepts]: Start accepts. Automaton has 10838 states and 54814 transitions. Word has length 14 [2022-11-18 19:43:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:43,043 INFO L495 AbstractCegarLoop]: Abstraction has 10838 states and 54814 transitions. [2022-11-18 19:43:43,043 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) [2022-11-18 19:43:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10838 states and 54814 transitions. [2022-11-18 19:43:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:43,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:43,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:43,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Ended with exit code 0 [2022-11-18 19:43:43,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:43,249 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:43,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1263244054, now seen corresponding path program 12 times [2022-11-18 19:43:43,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:43,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974278559] [2022-11-18 19:43:43,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:43:43,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:43,250 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:43,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Waiting until timeout for monitored process [2022-11-18 19:43:43,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 19:43:43,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:43,981 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:43,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:44,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:45,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974278559] [2022-11-18 19:43:45,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974278559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:45,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:45,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:43:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335759575] [2022-11-18 19:43:45,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:45,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:43:45,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:45,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:43:45,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:45,436 INFO L87 Difference]: Start difference. First operand 10838 states and 54814 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) [2022-11-18 19:43:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:47,016 INFO L93 Difference]: Finished difference Result 10964 states and 55350 transitions. [2022-11-18 19:43:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:43:47,017 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 14 [2022-11-18 19:43:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:47,060 INFO L225 Difference]: With dead ends: 10964 [2022-11-18 19:43:47,060 INFO L226 Difference]: Without dead ends: 10964 [2022-11-18 19:43:47,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:47,061 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:47,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 48 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 32 Unchecked, 1.0s Time] [2022-11-18 19:43:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2022-11-18 19:43:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 10860. [2022-11-18 19:43:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10860 states, 10855 states have (on average 5.0581298940580375) internal successors, (54906), 10859 states have internal predecessors, (54906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 54906 transitions. [2022-11-18 19:43:47,486 INFO L78 Accepts]: Start accepts. Automaton has 10860 states and 54906 transitions. Word has length 14 [2022-11-18 19:43:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:47,486 INFO L495 AbstractCegarLoop]: Abstraction has 10860 states and 54906 transitions. [2022-11-18 19:43:47,486 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) [2022-11-18 19:43:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10860 states and 54906 transitions. [2022-11-18 19:43:47,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:47,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:47,490 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:47,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:47,691 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1263239404, now seen corresponding path program 13 times [2022-11-18 19:43:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682168992] [2022-11-18 19:43:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:43:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:47,693 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:47,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Waiting until timeout for monitored process [2022-11-18 19:43:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:43:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:48,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:48,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:48,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:49,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:49,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682168992] [2022-11-18 19:43:49,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682168992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:49,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:49,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:43:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50588700] [2022-11-18 19:43:49,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:49,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:43:49,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:43:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:49,808 INFO L87 Difference]: Start difference. First operand 10860 states and 54906 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) [2022-11-18 19:43:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:50,823 INFO L93 Difference]: Finished difference Result 11002 states and 55526 transitions. [2022-11-18 19:43:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:43:50,824 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 14 [2022-11-18 19:43:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:50,979 INFO L225 Difference]: With dead ends: 11002 [2022-11-18 19:43:50,979 INFO L226 Difference]: Without dead ends: 11002 [2022-11-18 19:43:50,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:50,980 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:50,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 51 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-18 19:43:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2022-11-18 19:43:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 10964. [2022-11-18 19:43:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 10959 states have (on average 5.052285792499315) internal successors, (55368), 10963 states have internal predecessors, (55368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 55368 transitions. [2022-11-18 19:43:51,262 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 55368 transitions. Word has length 14 [2022-11-18 19:43:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:51,262 INFO L495 AbstractCegarLoop]: Abstraction has 10964 states and 55368 transitions. [2022-11-18 19:43:51,262 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) [2022-11-18 19:43:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 55368 transitions. [2022-11-18 19:43:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:51,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:51,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:51,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Ended with exit code 0 [2022-11-18 19:43:51,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:51,468 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1263095254, now seen corresponding path program 14 times [2022-11-18 19:43:51,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:51,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593688257] [2022-11-18 19:43:51,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:43:51,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:51,470 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:51,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Waiting until timeout for monitored process [2022-11-18 19:43:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:43:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:51,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:52,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:52,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:52,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:53,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593688257] [2022-11-18 19:43:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593688257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:53,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:53,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:43:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277457505] [2022-11-18 19:43:53,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:53,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:43:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:43:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:53,794 INFO L87 Difference]: Start difference. First operand 10964 states and 55368 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) [2022-11-18 19:43:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:56,344 INFO L93 Difference]: Finished difference Result 11431 states and 57375 transitions. [2022-11-18 19:43:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:43:56,346 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 14 [2022-11-18 19:43:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:56,397 INFO L225 Difference]: With dead ends: 11431 [2022-11-18 19:43:56,397 INFO L226 Difference]: Without dead ends: 11431 [2022-11-18 19:43:56,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:43:56,398 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:56,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 55 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 102 Unchecked, 1.8s Time] [2022-11-18 19:43:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2022-11-18 19:43:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 11204. [2022-11-18 19:43:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11204 states, 11199 states have (on average 5.043664612911867) internal successors, (56484), 11203 states have internal predecessors, (56484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11204 states to 11204 states and 56484 transitions. [2022-11-18 19:43:56,772 INFO L78 Accepts]: Start accepts. Automaton has 11204 states and 56484 transitions. Word has length 14 [2022-11-18 19:43:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:56,772 INFO L495 AbstractCegarLoop]: Abstraction has 11204 states and 56484 transitions. [2022-11-18 19:43:56,772 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) [2022-11-18 19:43:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 11204 states and 56484 transitions. [2022-11-18 19:43:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 19:43:56,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:56,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:56,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Forceful destruction successful, exit code 0 [2022-11-18 19:43:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:56,978 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:43:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1258626604, now seen corresponding path program 15 times [2022-11-18 19:43:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:43:56,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331326094] [2022-11-18 19:43:56,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:43:56,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:43:56,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:43:56,980 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:43:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Waiting until timeout for monitored process [2022-11-18 19:43:57,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 19:43:57,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:43:57,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:57,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:43:57,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:43:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:43:59,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:43:59,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331326094] [2022-11-18 19:43:59,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331326094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:59,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:43:59,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:43:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154462017] [2022-11-18 19:43:59,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:59,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:43:59,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:43:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:43:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:43:59,039 INFO L87 Difference]: Start difference. First operand 11204 states and 56484 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) [2022-11-18 19:44:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:00,440 INFO L93 Difference]: Finished difference Result 11230 states and 56586 transitions. [2022-11-18 19:44:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:00,441 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 14 [2022-11-18 19:44:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:00,484 INFO L225 Difference]: With dead ends: 11230 [2022-11-18 19:44:00,484 INFO L226 Difference]: Without dead ends: 11230 [2022-11-18 19:44:00,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:44:00,484 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:00,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 53 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 13 Unchecked, 0.8s Time] [2022-11-18 19:44:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11230 states. [2022-11-18 19:44:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11230 to 11196. [2022-11-18 19:44:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11196 states, 11191 states have (on average 5.044410687159324) internal successors, (56452), 11195 states have internal predecessors, (56452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11196 states to 11196 states and 56452 transitions. [2022-11-18 19:44:00,857 INFO L78 Accepts]: Start accepts. Automaton has 11196 states and 56452 transitions. Word has length 14 [2022-11-18 19:44:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:00,857 INFO L495 AbstractCegarLoop]: Abstraction has 11196 states and 56452 transitions. [2022-11-18 19:44:00,857 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) [2022-11-18 19:44:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 11196 states and 56452 transitions. [2022-11-18 19:44:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:00,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:00,864 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:00,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Ended with exit code 0 [2022-11-18 19:44:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:01,064 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1796700906, now seen corresponding path program 1 times [2022-11-18 19:44:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969002356] [2022-11-18 19:44:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:01,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:01,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:01,066 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:01,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Waiting until timeout for monitored process [2022-11-18 19:44:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:01,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:01,798 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:01,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:02,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:02,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969002356] [2022-11-18 19:44:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969002356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:02,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:02,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307300948] [2022-11-18 19:44:02,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:02,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:02,999 INFO L87 Difference]: Start difference. First operand 11196 states and 56452 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:04,591 INFO L93 Difference]: Finished difference Result 11453 states and 57547 transitions. [2022-11-18 19:44:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:44:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:04,636 INFO L225 Difference]: With dead ends: 11453 [2022-11-18 19:44:04,636 INFO L226 Difference]: Without dead ends: 11453 [2022-11-18 19:44:04,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:44:04,637 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:04,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 46 Unchecked, 1.1s Time] [2022-11-18 19:44:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11453 states. [2022-11-18 19:44:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11453 to 11269. [2022-11-18 19:44:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11264 states have (on average 5.041104403409091) internal successors, (56783), 11268 states have internal predecessors, (56783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 56783 transitions. [2022-11-18 19:44:05,079 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 56783 transitions. Word has length 15 [2022-11-18 19:44:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:05,080 INFO L495 AbstractCegarLoop]: Abstraction has 11269 states and 56783 transitions. [2022-11-18 19:44:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 56783 transitions. [2022-11-18 19:44:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:05,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:05,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:05,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:05,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:05,289 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1823512806, now seen corresponding path program 2 times [2022-11-18 19:44:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:05,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595206965] [2022-11-18 19:44:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:05,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:05,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:05,291 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:05,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Waiting until timeout for monitored process [2022-11-18 19:44:05,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:05,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:05,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:05,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:06,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:07,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:07,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595206965] [2022-11-18 19:44:07,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595206965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:07,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:07,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:07,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522473568] [2022-11-18 19:44:07,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:07,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:07,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:07,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:07,149 INFO L87 Difference]: Start difference. First operand 11269 states and 56783 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:09,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:09,320 INFO L93 Difference]: Finished difference Result 11441 states and 57482 transitions. [2022-11-18 19:44:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:09,409 INFO L225 Difference]: With dead ends: 11441 [2022-11-18 19:44:09,409 INFO L226 Difference]: Without dead ends: 11441 [2022-11-18 19:44:09,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:09,410 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:09,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 27 Unchecked, 1.3s Time] [2022-11-18 19:44:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11441 states. [2022-11-18 19:44:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11441 to 11282. [2022-11-18 19:44:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11282 states, 11277 states have (on average 5.039638201649375) internal successors, (56832), 11281 states have internal predecessors, (56832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11282 states to 11282 states and 56832 transitions. [2022-11-18 19:44:09,887 INFO L78 Accepts]: Start accepts. Automaton has 11282 states and 56832 transitions. Word has length 15 [2022-11-18 19:44:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:09,887 INFO L495 AbstractCegarLoop]: Abstraction has 11282 states and 56832 transitions. [2022-11-18 19:44:09,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11282 states and 56832 transitions. [2022-11-18 19:44:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:09,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:09,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:09,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Ended with exit code 0 [2022-11-18 19:44:10,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:10,094 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1628978750, now seen corresponding path program 3 times [2022-11-18 19:44:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:10,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677027395] [2022-11-18 19:44:10,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:44:10,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:10,096 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:10,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Waiting until timeout for monitored process [2022-11-18 19:44:10,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:44:10,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:10,773 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:10,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:11,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677027395] [2022-11-18 19:44:11,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677027395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:11,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:11,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088098741] [2022-11-18 19:44:11,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:11,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:11,961 INFO L87 Difference]: Start difference. First operand 11282 states and 56832 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:13,098 INFO L93 Difference]: Finished difference Result 11312 states and 56928 transitions. [2022-11-18 19:44:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:44:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:13,145 INFO L225 Difference]: With dead ends: 11312 [2022-11-18 19:44:13,145 INFO L226 Difference]: Without dead ends: 11312 [2022-11-18 19:44:13,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:13,145 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:13,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-11-18 19:44:13,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11312 states. [2022-11-18 19:44:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11312 to 11285. [2022-11-18 19:44:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11280 states have (on average 5.039095744680851) internal successors, (56841), 11284 states have internal predecessors, (56841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 56841 transitions. [2022-11-18 19:44:13,458 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 56841 transitions. Word has length 15 [2022-11-18 19:44:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:13,459 INFO L495 AbstractCegarLoop]: Abstraction has 11285 states and 56841 transitions. [2022-11-18 19:44:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 56841 transitions. [2022-11-18 19:44:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:13,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:13,465 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:13,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Ended with exit code 0 [2022-11-18 19:44:13,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:13,665 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1750883522, now seen corresponding path program 1 times [2022-11-18 19:44:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:13,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863412508] [2022-11-18 19:44:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:13,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:13,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:13,667 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:13,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Waiting until timeout for monitored process [2022-11-18 19:44:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:14,362 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:14,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:14,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:15,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863412508] [2022-11-18 19:44:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863412508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:15,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:15,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:15,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037083179] [2022-11-18 19:44:15,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:15,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:15,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:15,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:15,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:15,556 INFO L87 Difference]: Start difference. First operand 11285 states and 56841 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:17,535 INFO L93 Difference]: Finished difference Result 11415 states and 57344 transitions. [2022-11-18 19:44:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:17,574 INFO L225 Difference]: With dead ends: 11415 [2022-11-18 19:44:17,574 INFO L226 Difference]: Without dead ends: 11415 [2022-11-18 19:44:17,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:17,574 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:17,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 26 Unchecked, 1.2s Time] [2022-11-18 19:44:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2022-11-18 19:44:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 11296. [2022-11-18 19:44:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11291 states have (on average 5.037286334248517) internal successors, (56876), 11295 states have internal predecessors, (56876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 56876 transitions. [2022-11-18 19:44:17,974 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 56876 transitions. Word has length 15 [2022-11-18 19:44:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:17,974 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 56876 transitions. [2022-11-18 19:44:17,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 56876 transitions. [2022-11-18 19:44:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:17,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:17,983 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:17,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:18,184 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1670819628, now seen corresponding path program 4 times [2022-11-18 19:44:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691978659] [2022-11-18 19:44:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:44:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:18,186 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:18,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Waiting until timeout for monitored process [2022-11-18 19:44:18,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:44:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:18,822 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:18,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:19,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:19,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:19,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691978659] [2022-11-18 19:44:19,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691978659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:19,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:19,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:19,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193709147] [2022-11-18 19:44:19,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:19,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:19,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:19,973 INFO L87 Difference]: Start difference. First operand 11296 states and 56876 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:22,053 INFO L93 Difference]: Finished difference Result 11456 states and 57534 transitions. [2022-11-18 19:44:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:22,101 INFO L225 Difference]: With dead ends: 11456 [2022-11-18 19:44:22,101 INFO L226 Difference]: Without dead ends: 11456 [2022-11-18 19:44:22,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:22,102 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:22,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 50 Unchecked, 1.3s Time] [2022-11-18 19:44:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2022-11-18 19:44:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11318. [2022-11-18 19:44:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.035622734906744) internal successors, (56968), 11317 states have internal predecessors, (56968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56968 transitions. [2022-11-18 19:44:22,521 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56968 transitions. Word has length 15 [2022-11-18 19:44:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:22,521 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56968 transitions. [2022-11-18 19:44:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56968 transitions. [2022-11-18 19:44:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:22,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:22,527 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:22,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Ended with exit code 0 [2022-11-18 19:44:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:22,728 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 64768812, now seen corresponding path program 5 times [2022-11-18 19:44:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:22,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149442720] [2022-11-18 19:44:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:44:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:22,730 INFO L229 MonitoredProcess]: Starting monitored process 246 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:22,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Waiting until timeout for monitored process [2022-11-18 19:44:23,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:23,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:23,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:23,349 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:23,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:23,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:24,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:24,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149442720] [2022-11-18 19:44:24,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149442720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:24,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:24,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544518071] [2022-11-18 19:44:24,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:24,400 INFO L87 Difference]: Start difference. First operand 11318 states and 56968 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:26,764 INFO L93 Difference]: Finished difference Result 11459 states and 57545 transitions. [2022-11-18 19:44:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:26,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:26,812 INFO L225 Difference]: With dead ends: 11459 [2022-11-18 19:44:26,812 INFO L226 Difference]: Without dead ends: 11459 [2022-11-18 19:44:26,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:26,812 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:26,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 98 Unchecked, 1.6s Time] [2022-11-18 19:44:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2022-11-18 19:44:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11361. [2022-11-18 19:44:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 11356 states have (on average 5.030732652342374) internal successors, (57129), 11360 states have internal predecessors, (57129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 57129 transitions. [2022-11-18 19:44:27,153 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 57129 transitions. Word has length 15 [2022-11-18 19:44:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:27,153 INFO L495 AbstractCegarLoop]: Abstraction has 11361 states and 57129 transitions. [2022-11-18 19:44:27,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 57129 transitions. [2022-11-18 19:44:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:27,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:27,159 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:27,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Ended with exit code 0 [2022-11-18 19:44:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:27,359 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash 25980930, now seen corresponding path program 2 times [2022-11-18 19:44:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049239690] [2022-11-18 19:44:27,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:27,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:27,361 INFO L229 MonitoredProcess]: Starting monitored process 247 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:27,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Waiting until timeout for monitored process [2022-11-18 19:44:27,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:28,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:28,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:28,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:29,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:29,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049239690] [2022-11-18 19:44:29,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049239690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:29,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:29,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278951169] [2022-11-18 19:44:29,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:29,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:29,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:29,148 INFO L87 Difference]: Start difference. First operand 11361 states and 57129 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:31,322 INFO L93 Difference]: Finished difference Result 11450 states and 57486 transitions. [2022-11-18 19:44:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:31,366 INFO L225 Difference]: With dead ends: 11450 [2022-11-18 19:44:31,366 INFO L226 Difference]: Without dead ends: 11450 [2022-11-18 19:44:31,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:31,367 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:31,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 58 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 55 Unchecked, 1.3s Time] [2022-11-18 19:44:31,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11450 states. [2022-11-18 19:44:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11450 to 11367. [2022-11-18 19:44:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11362 states have (on average 5.029836296426685) internal successors, (57149), 11366 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 57149 transitions. [2022-11-18 19:44:31,787 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 57149 transitions. Word has length 15 [2022-11-18 19:44:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:31,788 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 57149 transitions. [2022-11-18 19:44:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 57149 transitions. [2022-11-18 19:44:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:31,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:31,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:31,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:31,995 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1950669140, now seen corresponding path program 6 times [2022-11-18 19:44:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:31,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404754576] [2022-11-18 19:44:31,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:44:31,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:31,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:31,997 INFO L229 MonitoredProcess]: Starting monitored process 248 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:31,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Waiting until timeout for monitored process [2022-11-18 19:44:32,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:44:32,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:44:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:32,622 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:32,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:32,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:33,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:33,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404754576] [2022-11-18 19:44:33,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404754576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:33,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:33,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:44:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607689596] [2022-11-18 19:44:33,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:33,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 19:44:33,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 19:44:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:44:33,723 INFO L87 Difference]: Start difference. First operand 11367 states and 57149 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:36,281 INFO L93 Difference]: Finished difference Result 11476 states and 57527 transitions. [2022-11-18 19:44:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 19:44:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:36,320 INFO L225 Difference]: With dead ends: 11476 [2022-11-18 19:44:36,320 INFO L226 Difference]: Without dead ends: 11476 [2022-11-18 19:44:36,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:36,320 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:36,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 79 Unchecked, 1.6s Time] [2022-11-18 19:44:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-11-18 19:44:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11342. [2022-11-18 19:44:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11337 states have (on average 5.032724706712534) internal successors, (57056), 11341 states have internal predecessors, (57056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:36,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 57056 transitions. [2022-11-18 19:44:36,571 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 57056 transitions. Word has length 15 [2022-11-18 19:44:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:36,571 INFO L495 AbstractCegarLoop]: Abstraction has 11342 states and 57056 transitions. [2022-11-18 19:44:36,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 57056 transitions. [2022-11-18 19:44:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:36,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:36,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:36,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Ended with exit code 0 [2022-11-18 19:44:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:36,777 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash -43627812, now seen corresponding path program 1 times [2022-11-18 19:44:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:36,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779294333] [2022-11-18 19:44:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:36,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:36,779 INFO L229 MonitoredProcess]: Starting monitored process 249 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Waiting until timeout for monitored process [2022-11-18 19:44:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:44:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:37,431 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:37,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:37,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:38,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:38,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779294333] [2022-11-18 19:44:38,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779294333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:38,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:38,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:44:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854384138] [2022-11-18 19:44:38,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:38,723 INFO L87 Difference]: Start difference. First operand 11342 states and 57056 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:41,051 INFO L93 Difference]: Finished difference Result 11416 states and 57203 transitions. [2022-11-18 19:44:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:44:41,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:41,090 INFO L225 Difference]: With dead ends: 11416 [2022-11-18 19:44:41,090 INFO L226 Difference]: Without dead ends: 11416 [2022-11-18 19:44:41,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:41,090 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:41,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 89 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 119 Unchecked, 1.9s Time] [2022-11-18 19:44:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2022-11-18 19:44:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 11322. [2022-11-18 19:44:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11317 states have (on average 5.036493770433861) internal successors, (56998), 11321 states have internal predecessors, (56998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 56998 transitions. [2022-11-18 19:44:41,363 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 56998 transitions. Word has length 15 [2022-11-18 19:44:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:41,363 INFO L495 AbstractCegarLoop]: Abstraction has 11322 states and 56998 transitions. [2022-11-18 19:44:41,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 56998 transitions. [2022-11-18 19:44:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:41,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:41,369 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:41,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Ended with exit code 0 [2022-11-18 19:44:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:41,571 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -43760802, now seen corresponding path program 2 times [2022-11-18 19:44:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151183183] [2022-11-18 19:44:41,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:44:41,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:41,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:41,573 INFO L229 MonitoredProcess]: Starting monitored process 250 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:41,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Waiting until timeout for monitored process [2022-11-18 19:44:42,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:44:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:44:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:42,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:42,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:42,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:43,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151183183] [2022-11-18 19:44:43,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151183183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:43,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:43,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:44:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138263702] [2022-11-18 19:44:43,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:43,684 INFO L87 Difference]: Start difference. First operand 11322 states and 56998 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:46,079 INFO L93 Difference]: Finished difference Result 11398 states and 57170 transitions. [2022-11-18 19:44:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:44:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:46,135 INFO L225 Difference]: With dead ends: 11398 [2022-11-18 19:44:46,135 INFO L226 Difference]: Without dead ends: 11398 [2022-11-18 19:44:46,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:46,135 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:46,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 99 Unchecked, 1.8s Time] [2022-11-18 19:44:46,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11398 states. [2022-11-18 19:44:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11398 to 11331. [2022-11-18 19:44:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.035405262228501) internal successors, (57031), 11330 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 57031 transitions. [2022-11-18 19:44:46,521 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 57031 transitions. Word has length 15 [2022-11-18 19:44:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:46,521 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 57031 transitions. [2022-11-18 19:44:46,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 57031 transitions. [2022-11-18 19:44:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:46,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:46,529 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:46,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Ended with exit code 0 [2022-11-18 19:44:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:46,730 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash -47883492, now seen corresponding path program 3 times [2022-11-18 19:44:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:46,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482796814] [2022-11-18 19:44:46,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:44:46,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:46,732 INFO L229 MonitoredProcess]: Starting monitored process 251 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:46,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Waiting until timeout for monitored process [2022-11-18 19:44:47,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:44:47,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:44:47,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:47,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:47,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:47,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:44:48,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482796814] [2022-11-18 19:44:48,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482796814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:48,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:48,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:44:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115173755] [2022-11-18 19:44:48,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:48,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:48,874 INFO L87 Difference]: Start difference. First operand 11331 states and 57031 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:51,762 INFO L93 Difference]: Finished difference Result 11564 states and 57691 transitions. [2022-11-18 19:44:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:44:51,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:51,813 INFO L225 Difference]: With dead ends: 11564 [2022-11-18 19:44:51,814 INFO L226 Difference]: Without dead ends: 11564 [2022-11-18 19:44:51,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:44:51,814 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:51,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 91 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 213 Unchecked, 2.4s Time] [2022-11-18 19:44:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11564 states. [2022-11-18 19:44:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11564 to 11341. [2022-11-18 19:44:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11341 states, 11336 states have (on average 5.0333450952717005) internal successors, (57058), 11340 states have internal predecessors, (57058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11341 states to 11341 states and 57058 transitions. [2022-11-18 19:44:52,172 INFO L78 Accepts]: Start accepts. Automaton has 11341 states and 57058 transitions. Word has length 15 [2022-11-18 19:44:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:52,172 INFO L495 AbstractCegarLoop]: Abstraction has 11341 states and 57058 transitions. [2022-11-18 19:44:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11341 states and 57058 transitions. [2022-11-18 19:44:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:52,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:52,179 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:52,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Ended with exit code 0 [2022-11-18 19:44:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:52,380 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1826943507, now seen corresponding path program 1 times [2022-11-18 19:44:52,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121672715] [2022-11-18 19:44:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:52,382 INFO L229 MonitoredProcess]: Starting monitored process 252 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:52,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Waiting until timeout for monitored process [2022-11-18 19:44:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:44:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:53,019 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:53,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:53,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:54,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:54,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121672715] [2022-11-18 19:44:54,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121672715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:54,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:54,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:44:54,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144464969] [2022-11-18 19:44:54,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:54,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:54,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:54,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:54,497 INFO L87 Difference]: Start difference. First operand 11341 states and 57058 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:44:57,070 INFO L93 Difference]: Finished difference Result 11562 states and 57743 transitions. [2022-11-18 19:44:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:44:57,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:44:57,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:44:57,123 INFO L225 Difference]: With dead ends: 11562 [2022-11-18 19:44:57,123 INFO L226 Difference]: Without dead ends: 11562 [2022-11-18 19:44:57,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:44:57,124 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:44:57,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 84 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 145 Unchecked, 1.9s Time] [2022-11-18 19:44:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11562 states. [2022-11-18 19:44:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11562 to 11420. [2022-11-18 19:44:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11420 states, 11415 states have (on average 5.023215067893123) internal successors, (57340), 11419 states have internal predecessors, (57340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11420 states to 11420 states and 57340 transitions. [2022-11-18 19:44:57,443 INFO L78 Accepts]: Start accepts. Automaton has 11420 states and 57340 transitions. Word has length 15 [2022-11-18 19:44:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:44:57,443 INFO L495 AbstractCegarLoop]: Abstraction has 11420 states and 57340 transitions. [2022-11-18 19:44:57,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11420 states and 57340 transitions. [2022-11-18 19:44:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:44:57,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:44:57,450 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:57,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Ended with exit code 0 [2022-11-18 19:44:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:44:57,651 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:44:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1719974662, now seen corresponding path program 4 times [2022-11-18 19:44:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:44:57,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416770717] [2022-11-18 19:44:57,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:44:57,652 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 [2022-11-18 19:44:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:44:57,653 INFO L229 MonitoredProcess]: Starting monitored process 253 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:44:57,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Waiting until timeout for monitored process [2022-11-18 19:44:58,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:44:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:44:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:44:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:58,298 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:44:58,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:44:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:58,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:59,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:44:59,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416770717] [2022-11-18 19:44:59,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416770717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:59,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:44:59,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:44:59,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028105622] [2022-11-18 19:44:59,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:59,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:44:59,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:44:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:44:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:44:59,706 INFO L87 Difference]: Start difference. First operand 11420 states and 57340 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:02,460 INFO L93 Difference]: Finished difference Result 11579 states and 57787 transitions. [2022-11-18 19:45:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:02,504 INFO L225 Difference]: With dead ends: 11579 [2022-11-18 19:45:02,504 INFO L226 Difference]: Without dead ends: 11579 [2022-11-18 19:45:02,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:02,504 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 85 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 111 Unchecked, 2.2s Time] [2022-11-18 19:45:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11579 states. [2022-11-18 19:45:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11579 to 11414. [2022-11-18 19:45:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11409 states have (on average 5.024016127618546) internal successors, (57319), 11413 states have internal predecessors, (57319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:02,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 57319 transitions. [2022-11-18 19:45:02,794 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 57319 transitions. Word has length 15 [2022-11-18 19:45:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:02,794 INFO L495 AbstractCegarLoop]: Abstraction has 11414 states and 57319 transitions. [2022-11-18 19:45:02,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 57319 transitions. [2022-11-18 19:45:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:02,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:02,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:02,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Ended with exit code 0 [2022-11-18 19:45:03,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:03,002 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:03,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1190382582, now seen corresponding path program 5 times [2022-11-18 19:45:03,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:03,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548624556] [2022-11-18 19:45:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:45:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:03,005 INFO L229 MonitoredProcess]: Starting monitored process 254 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:03,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Waiting until timeout for monitored process [2022-11-18 19:45:03,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:03,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 19:45:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:03,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:03,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:04,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:06,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548624556] [2022-11-18 19:45:06,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548624556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:06,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:06,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:45:06,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544910351] [2022-11-18 19:45:06,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:45:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:45:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:45:06,134 INFO L87 Difference]: Start difference. First operand 11414 states and 57319 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:11,120 INFO L93 Difference]: Finished difference Result 12444 states and 60588 transitions. [2022-11-18 19:45:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:45:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:11,164 INFO L225 Difference]: With dead ends: 12444 [2022-11-18 19:45:11,164 INFO L226 Difference]: Without dead ends: 12444 [2022-11-18 19:45:11,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:45:11,164 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:11,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 121 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 0 Unknown, 635 Unchecked, 3.5s Time] [2022-11-18 19:45:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2022-11-18 19:45:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 11331. [2022-11-18 19:45:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.027635528871623) internal successors, (56943), 11330 states have internal predecessors, (56943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 56943 transitions. [2022-11-18 19:45:11,456 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 56943 transitions. Word has length 15 [2022-11-18 19:45:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:11,456 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 56943 transitions. [2022-11-18 19:45:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 56943 transitions. [2022-11-18 19:45:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:11,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:11,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:11,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Ended with exit code 0 [2022-11-18 19:45:11,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:11,663 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2059441761, now seen corresponding path program 2 times [2022-11-18 19:45:11,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941809088] [2022-11-18 19:45:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:45:11,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:11,666 INFO L229 MonitoredProcess]: Starting monitored process 255 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Waiting until timeout for monitored process [2022-11-18 19:45:12,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:12,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:12,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:12,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:12,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:13,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941809088] [2022-11-18 19:45:13,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941809088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:13,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:13,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664610456] [2022-11-18 19:45:13,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:13,800 INFO L87 Difference]: Start difference. First operand 11331 states and 56943 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:16,209 INFO L93 Difference]: Finished difference Result 11407 states and 57135 transitions. [2022-11-18 19:45:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:45:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:16,254 INFO L225 Difference]: With dead ends: 11407 [2022-11-18 19:45:16,254 INFO L226 Difference]: Without dead ends: 11407 [2022-11-18 19:45:16,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:16,254 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:16,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 78 Unchecked, 1.8s Time] [2022-11-18 19:45:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11407 states. [2022-11-18 19:45:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 11340. [2022-11-18 19:45:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11340 states, 11335 states have (on average 5.026731363034848) internal successors, (56978), 11339 states have internal predecessors, (56978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11340 states to 11340 states and 56978 transitions. [2022-11-18 19:45:16,563 INFO L78 Accepts]: Start accepts. Automaton has 11340 states and 56978 transitions. Word has length 15 [2022-11-18 19:45:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 11340 states and 56978 transitions. [2022-11-18 19:45:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 11340 states and 56978 transitions. [2022-11-18 19:45:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:16,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:16,571 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:16,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:16,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:16,772 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2058746958, now seen corresponding path program 6 times [2022-11-18 19:45:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:16,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063779370] [2022-11-18 19:45:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:45:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:16,774 INFO L229 MonitoredProcess]: Starting monitored process 256 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:16,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (256)] Waiting until timeout for monitored process [2022-11-18 19:45:17,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 19:45:17,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:17,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:17,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:17,476 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:17,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:17,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:18,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:18,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063779370] [2022-11-18 19:45:18,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063779370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:18,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:18,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152964074] [2022-11-18 19:45:18,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:18,884 INFO L87 Difference]: Start difference. First operand 11340 states and 56978 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:21,468 INFO L93 Difference]: Finished difference Result 11446 states and 57229 transitions. [2022-11-18 19:45:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:45:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:21,510 INFO L225 Difference]: With dead ends: 11446 [2022-11-18 19:45:21,510 INFO L226 Difference]: Without dead ends: 11446 [2022-11-18 19:45:21,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:21,511 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:21,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 87 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 124 Unchecked, 2.0s Time] [2022-11-18 19:45:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11446 states. [2022-11-18 19:45:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11446 to 11325. [2022-11-18 19:45:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11320 states have (on average 5.0290636042402825) internal successors, (56929), 11324 states have internal predecessors, (56929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 56929 transitions. [2022-11-18 19:45:21,914 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 56929 transitions. Word has length 15 [2022-11-18 19:45:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:21,915 INFO L495 AbstractCegarLoop]: Abstraction has 11325 states and 56929 transitions. [2022-11-18 19:45:21,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 56929 transitions. [2022-11-18 19:45:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:21,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:21,923 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:21,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (256)] Ended with exit code 0 [2022-11-18 19:45:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:22,125 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:22,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2056959498, now seen corresponding path program 7 times [2022-11-18 19:45:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:22,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020172005] [2022-11-18 19:45:22,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:45:22,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:22,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:22,128 INFO L229 MonitoredProcess]: Starting monitored process 257 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:22,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (257)] Waiting until timeout for monitored process [2022-11-18 19:45:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:22,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:22,827 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:22,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:24,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:24,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020172005] [2022-11-18 19:45:24,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020172005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:24,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:24,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510230328] [2022-11-18 19:45:24,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:24,225 INFO L87 Difference]: Start difference. First operand 11325 states and 56929 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:26,918 INFO L93 Difference]: Finished difference Result 11476 states and 57331 transitions. [2022-11-18 19:45:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:26,966 INFO L225 Difference]: With dead ends: 11476 [2022-11-18 19:45:26,966 INFO L226 Difference]: Without dead ends: 11476 [2022-11-18 19:45:26,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:26,967 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:26,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 74 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 304 Invalid, 0 Unknown, 107 Unchecked, 2.2s Time] [2022-11-18 19:45:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-11-18 19:45:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11327. [2022-11-18 19:45:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11327 states, 11322 states have (on average 5.029146793852676) internal successors, (56940), 11326 states have internal predecessors, (56940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11327 states to 11327 states and 56940 transitions. [2022-11-18 19:45:27,281 INFO L78 Accepts]: Start accepts. Automaton has 11327 states and 56940 transitions. Word has length 15 [2022-11-18 19:45:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:27,281 INFO L495 AbstractCegarLoop]: Abstraction has 11327 states and 56940 transitions. [2022-11-18 19:45:27,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11327 states and 56940 transitions. [2022-11-18 19:45:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:27,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:27,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:27,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (257)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:27,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:27,495 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash 521444508, now seen corresponding path program 8 times [2022-11-18 19:45:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690252519] [2022-11-18 19:45:27,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:45:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:27,497 INFO L229 MonitoredProcess]: Starting monitored process 258 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:27,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (258)] Waiting until timeout for monitored process [2022-11-18 19:45:28,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:28,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:28,187 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:28,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:28,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:29,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690252519] [2022-11-18 19:45:29,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690252519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:29,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:29,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341427729] [2022-11-18 19:45:29,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:29,586 INFO L87 Difference]: Start difference. First operand 11327 states and 56940 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:32,390 INFO L93 Difference]: Finished difference Result 11516 states and 57419 transitions. [2022-11-18 19:45:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:32,433 INFO L225 Difference]: With dead ends: 11516 [2022-11-18 19:45:32,433 INFO L226 Difference]: Without dead ends: 11516 [2022-11-18 19:45:32,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:32,433 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:32,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 95 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 373 Invalid, 0 Unknown, 180 Unchecked, 2.3s Time] [2022-11-18 19:45:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11516 states. [2022-11-18 19:45:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11516 to 11317. [2022-11-18 19:45:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 11312 states have (on average 5.030498585572843) internal successors, (56905), 11316 states have internal predecessors, (56905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 56905 transitions. [2022-11-18 19:45:32,713 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 56905 transitions. Word has length 15 [2022-11-18 19:45:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:32,713 INFO L495 AbstractCegarLoop]: Abstraction has 11317 states and 56905 transitions. [2022-11-18 19:45:32,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 56905 transitions. [2022-11-18 19:45:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:32,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:32,719 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:32,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (258)] Ended with exit code 0 [2022-11-18 19:45:32,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:32,920 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash 523231968, now seen corresponding path program 9 times [2022-11-18 19:45:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496817594] [2022-11-18 19:45:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:45:32,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:32,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:32,921 INFO L229 MonitoredProcess]: Starting monitored process 259 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:32,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (259)] Waiting until timeout for monitored process [2022-11-18 19:45:33,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:45:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:33,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:33,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:33,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:35,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:35,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496817594] [2022-11-18 19:45:35,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496817594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:35,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:35,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542033279] [2022-11-18 19:45:35,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:35,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:35,037 INFO L87 Difference]: Start difference. First operand 11317 states and 56905 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:36,486 INFO L93 Difference]: Finished difference Result 11382 states and 57101 transitions. [2022-11-18 19:45:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:45:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:36,527 INFO L225 Difference]: With dead ends: 11382 [2022-11-18 19:45:36,527 INFO L226 Difference]: Without dead ends: 11382 [2022-11-18 19:45:36,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:36,527 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:36,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 157 Unchecked, 0.9s Time] [2022-11-18 19:45:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-11-18 19:45:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 11320. [2022-11-18 19:45:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11315 states have (on average 5.030755634114008) internal successors, (56923), 11319 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 56923 transitions. [2022-11-18 19:45:36,797 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 56923 transitions. Word has length 15 [2022-11-18 19:45:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:36,797 INFO L495 AbstractCegarLoop]: Abstraction has 11320 states and 56923 transitions. [2022-11-18 19:45:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 56923 transitions. [2022-11-18 19:45:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:36,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:36,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:36,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (259)] Ended with exit code 0 [2022-11-18 19:45:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:37,005 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:37,005 INFO L85 PathProgramCache]: Analyzing trace with hash 360111452, now seen corresponding path program 10 times [2022-11-18 19:45:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889398992] [2022-11-18 19:45:37,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:45:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:37,006 INFO L229 MonitoredProcess]: Starting monitored process 260 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:37,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (260)] Waiting until timeout for monitored process [2022-11-18 19:45:37,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:45:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:37,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:37,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:37,698 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:37,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:39,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:39,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889398992] [2022-11-18 19:45:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889398992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:39,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:39,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213309132] [2022-11-18 19:45:39,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:39,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:39,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:39,090 INFO L87 Difference]: Start difference. First operand 11320 states and 56923 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:42,224 INFO L93 Difference]: Finished difference Result 11501 states and 57383 transitions. [2022-11-18 19:45:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:42,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:42,266 INFO L225 Difference]: With dead ends: 11501 [2022-11-18 19:45:42,266 INFO L226 Difference]: Without dead ends: 11501 [2022-11-18 19:45:42,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:42,267 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:42,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 77 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 120 Unchecked, 2.6s Time] [2022-11-18 19:45:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2022-11-18 19:45:42,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11318. [2022-11-18 19:45:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.0311146468664365) internal successors, (56917), 11317 states have internal predecessors, (56917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56917 transitions. [2022-11-18 19:45:42,548 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56917 transitions. Word has length 15 [2022-11-18 19:45:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:42,548 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56917 transitions. [2022-11-18 19:45:42,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56917 transitions. [2022-11-18 19:45:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:42,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:42,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:42,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (260)] Ended with exit code 0 [2022-11-18 19:45:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:42,754 INFO L420 AbstractCegarLoop]: === Iteration 260 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash 359978462, now seen corresponding path program 11 times [2022-11-18 19:45:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:42,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28653248] [2022-11-18 19:45:42,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:45:42,755 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 [2022-11-18 19:45:42,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:42,756 INFO L229 MonitoredProcess]: Starting monitored process 261 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:42,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (261)] Waiting until timeout for monitored process [2022-11-18 19:45:43,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:45:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:43,476 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:43,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:43,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:45:45,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28653248] [2022-11-18 19:45:45,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28653248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:45,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:45,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853211231] [2022-11-18 19:45:45,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:45,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:45,249 INFO L87 Difference]: Start difference. First operand 11318 states and 56917 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:48,033 INFO L93 Difference]: Finished difference Result 11577 states and 57591 transitions. [2022-11-18 19:45:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:48,082 INFO L225 Difference]: With dead ends: 11577 [2022-11-18 19:45:48,082 INFO L226 Difference]: Without dead ends: 11577 [2022-11-18 19:45:48,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:45:48,082 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:48,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 56 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 201 Unchecked, 2.0s Time] [2022-11-18 19:45:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2022-11-18 19:45:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 11331. [2022-11-18 19:45:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.029401377361823) internal successors, (56963), 11330 states have internal predecessors, (56963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 56963 transitions. [2022-11-18 19:45:48,389 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 56963 transitions. Word has length 15 [2022-11-18 19:45:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:48,390 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 56963 transitions. [2022-11-18 19:45:48,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 56963 transitions. [2022-11-18 19:45:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:48,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:48,396 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:48,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (261)] Ended with exit code 0 [2022-11-18 19:45:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:48,596 INFO L420 AbstractCegarLoop]: === Iteration 261 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1553792588, now seen corresponding path program 12 times [2022-11-18 19:45:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:48,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315996782] [2022-11-18 19:45:48,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:45:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:48,598 INFO L229 MonitoredProcess]: Starting monitored process 262 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:48,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (262)] Waiting until timeout for monitored process [2022-11-18 19:45:49,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 19:45:49,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:49,356 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:49,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:49,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:50,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315996782] [2022-11-18 19:45:50,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315996782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:50,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:50,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:50,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680133900] [2022-11-18 19:45:50,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:50,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:50,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:50,751 INFO L87 Difference]: Start difference. First operand 11331 states and 56963 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:53,829 INFO L93 Difference]: Finished difference Result 11637 states and 57710 transitions. [2022-11-18 19:45:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:53,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:53,875 INFO L225 Difference]: With dead ends: 11637 [2022-11-18 19:45:53,875 INFO L226 Difference]: Without dead ends: 11637 [2022-11-18 19:45:53,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:53,875 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:53,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 73 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 153 Unchecked, 2.5s Time] [2022-11-18 19:45:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11637 states. [2022-11-18 19:45:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11637 to 11320. [2022-11-18 19:45:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11315 states have (on average 5.02960671674768) internal successors, (56910), 11319 states have internal predecessors, (56910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 56910 transitions. [2022-11-18 19:45:54,172 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 56910 transitions. Word has length 15 [2022-11-18 19:45:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:54,173 INFO L495 AbstractCegarLoop]: Abstraction has 11320 states and 56910 transitions. [2022-11-18 19:45:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 56910 transitions. [2022-11-18 19:45:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:54,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:54,179 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:54,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (262)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:54,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:54,394 INFO L420 AbstractCegarLoop]: === Iteration 262 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash 833590882, now seen corresponding path program 13 times [2022-11-18 19:45:54,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:54,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485898303] [2022-11-18 19:45:54,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:45:54,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:54,396 INFO L229 MonitoredProcess]: Starting monitored process 263 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:54,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (263)] Waiting until timeout for monitored process [2022-11-18 19:45:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:54,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:55,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:45:55,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:45:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:55,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:56,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:45:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485898303] [2022-11-18 19:45:56,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485898303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:56,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:56,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:45:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288812609] [2022-11-18 19:45:56,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:45:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:45:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:45:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:45:56,468 INFO L87 Difference]: Start difference. First operand 11320 states and 56910 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:58,808 INFO L93 Difference]: Finished difference Result 11382 states and 57032 transitions. [2022-11-18 19:45:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:45:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:45:58,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:58,853 INFO L225 Difference]: With dead ends: 11382 [2022-11-18 19:45:58,853 INFO L226 Difference]: Without dead ends: 11382 [2022-11-18 19:45:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:45:58,853 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:58,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 71 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 83 Unchecked, 1.8s Time] [2022-11-18 19:45:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-11-18 19:45:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 11327. [2022-11-18 19:45:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11327 states, 11322 states have (on average 5.029146793852676) internal successors, (56940), 11326 states have internal predecessors, (56940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11327 states to 11327 states and 56940 transitions. [2022-11-18 19:45:59,165 INFO L78 Accepts]: Start accepts. Automaton has 11327 states and 56940 transitions. Word has length 15 [2022-11-18 19:45:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:59,165 INFO L495 AbstractCegarLoop]: Abstraction has 11327 states and 56940 transitions. [2022-11-18 19:45:59,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:59,165 INFO L276 IsEmpty]: Start isEmpty. Operand 11327 states and 56940 transitions. [2022-11-18 19:45:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:45:59,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:59,172 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:59,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (263)] Ended with exit code 0 [2022-11-18 19:45:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:59,372 INFO L420 AbstractCegarLoop]: === Iteration 263 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:45:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1166653088, now seen corresponding path program 14 times [2022-11-18 19:45:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:45:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352193963] [2022-11-18 19:45:59,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:45:59,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:45:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:45:59,374 INFO L229 MonitoredProcess]: Starting monitored process 264 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:45:59,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (264)] Waiting until timeout for monitored process [2022-11-18 19:45:59,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:45:59,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:45:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:00,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:00,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:00,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:01,466 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:01,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352193963] [2022-11-18 19:46:01,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352193963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:01,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:01,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:46:01,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569596620] [2022-11-18 19:46:01,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:46:01,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:01,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:46:01,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:46:01,467 INFO L87 Difference]: Start difference. First operand 11327 states and 56940 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:03,895 INFO L93 Difference]: Finished difference Result 11492 states and 57307 transitions. [2022-11-18 19:46:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 19:46:03,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:46:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:03,947 INFO L225 Difference]: With dead ends: 11492 [2022-11-18 19:46:03,947 INFO L226 Difference]: Without dead ends: 11492 [2022-11-18 19:46:03,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:46:03,948 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:03,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 67 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 107 Unchecked, 1.8s Time] [2022-11-18 19:46:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11492 states. [2022-11-18 19:46:04,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11492 to 11296. [2022-11-18 19:46:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11291 states have (on average 5.033123726862103) internal successors, (56829), 11295 states have internal predecessors, (56829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 56829 transitions. [2022-11-18 19:46:04,376 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 56829 transitions. Word has length 15 [2022-11-18 19:46:04,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:04,376 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 56829 transitions. [2022-11-18 19:46:04,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 56829 transitions. [2022-11-18 19:46:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:04,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:04,382 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:04,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (264)] Ended with exit code 0 [2022-11-18 19:46:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:04,583 INFO L420 AbstractCegarLoop]: === Iteration 264 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 263795101, now seen corresponding path program 3 times [2022-11-18 19:46:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406584235] [2022-11-18 19:46:04,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:46:04,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:04,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:04,585 INFO L229 MonitoredProcess]: Starting monitored process 265 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:04,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (265)] Waiting until timeout for monitored process [2022-11-18 19:46:05,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 19:46:05,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:46:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:05,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:05,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:06,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406584235] [2022-11-18 19:46:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406584235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:06,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 19:46:06,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574529484] [2022-11-18 19:46:06,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:46:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:46:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:46:06,788 INFO L87 Difference]: Start difference. First operand 11296 states and 56829 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:09,537 INFO L93 Difference]: Finished difference Result 11474 states and 57305 transitions. [2022-11-18 19:46:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 19:46:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:46:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:09,579 INFO L225 Difference]: With dead ends: 11474 [2022-11-18 19:46:09,579 INFO L226 Difference]: Without dead ends: 11474 [2022-11-18 19:46:09,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:46:09,580 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:09,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 73 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 71 Unchecked, 2.2s Time] [2022-11-18 19:46:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11474 states. [2022-11-18 19:46:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11474 to 11318. [2022-11-18 19:46:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.030407495801291) internal successors, (56909), 11317 states have internal predecessors, (56909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56909 transitions. [2022-11-18 19:46:09,855 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56909 transitions. Word has length 15 [2022-11-18 19:46:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:09,855 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56909 transitions. [2022-11-18 19:46:09,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56909 transitions. [2022-11-18 19:46:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:09,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:09,862 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:09,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (265)] Ended with exit code 0 [2022-11-18 19:46:10,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:10,062 INFO L420 AbstractCegarLoop]: === Iteration 265 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:10,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:10,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1052320548, now seen corresponding path program 10 times [2022-11-18 19:46:10,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:10,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899751268] [2022-11-18 19:46:10,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:46:10,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:10,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:10,064 INFO L229 MonitoredProcess]: Starting monitored process 266 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:10,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (266)] Waiting until timeout for monitored process [2022-11-18 19:46:10,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:46:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 19:46:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:10,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:10,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:11,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:13,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899751268] [2022-11-18 19:46:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899751268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:13,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:46:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470043150] [2022-11-18 19:46:13,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:13,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:46:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:46:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:46:13,158 INFO L87 Difference]: Start difference. First operand 11318 states and 56909 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:20,966 INFO L93 Difference]: Finished difference Result 11981 states and 58946 transitions. [2022-11-18 19:46:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:46:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:46:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:21,013 INFO L225 Difference]: With dead ends: 11981 [2022-11-18 19:46:21,013 INFO L226 Difference]: Without dead ends: 11981 [2022-11-18 19:46:21,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-18 19:46:21,013 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 363 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:21,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 196 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 749 Invalid, 0 Unknown, 569 Unchecked, 4.7s Time] [2022-11-18 19:46:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2022-11-18 19:46:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 11334. [2022-11-18 19:46:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11334 states, 11329 states have (on average 5.027628210786477) internal successors, (56958), 11333 states have internal predecessors, (56958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11334 states to 11334 states and 56958 transitions. [2022-11-18 19:46:21,330 INFO L78 Accepts]: Start accepts. Automaton has 11334 states and 56958 transitions. Word has length 15 [2022-11-18 19:46:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:21,330 INFO L495 AbstractCegarLoop]: Abstraction has 11334 states and 56958 transitions. [2022-11-18 19:46:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11334 states and 56958 transitions. [2022-11-18 19:46:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:21,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:21,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:21,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (266)] Ended with exit code 0 [2022-11-18 19:46:21,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:21,538 INFO L420 AbstractCegarLoop]: === Iteration 266 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1052320486, now seen corresponding path program 11 times [2022-11-18 19:46:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991977519] [2022-11-18 19:46:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:46:21,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:21,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:21,540 INFO L229 MonitoredProcess]: Starting monitored process 267 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:21,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (267)] Waiting until timeout for monitored process [2022-11-18 19:46:22,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 19:46:22,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:46:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:22,485 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:22,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:23,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:24,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991977519] [2022-11-18 19:46:24,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991977519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:24,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:24,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:46:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681655535] [2022-11-18 19:46:24,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:46:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:24,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:46:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:46:24,328 INFO L87 Difference]: Start difference. First operand 11334 states and 56958 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:25,728 INFO L93 Difference]: Finished difference Result 11803 states and 59258 transitions. [2022-11-18 19:46:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:46:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:46:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:25,775 INFO L225 Difference]: With dead ends: 11803 [2022-11-18 19:46:25,775 INFO L226 Difference]: Without dead ends: 11803 [2022-11-18 19:46:25,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:46:25,775 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:25,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 32 Unchecked, 0.7s Time] [2022-11-18 19:46:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11803 states. [2022-11-18 19:46:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11803 to 11471. [2022-11-18 19:46:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 11466 states have (on average 5.025117739403454) internal successors, (57618), 11470 states have internal predecessors, (57618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 57618 transitions. [2022-11-18 19:46:26,076 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 57618 transitions. Word has length 15 [2022-11-18 19:46:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:26,077 INFO L495 AbstractCegarLoop]: Abstraction has 11471 states and 57618 transitions. [2022-11-18 19:46:26,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 57618 transitions. [2022-11-18 19:46:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:26,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:26,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:26,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (267)] Ended with exit code 0 [2022-11-18 19:46:26,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:26,284 INFO L420 AbstractCegarLoop]: === Iteration 267 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1052318626, now seen corresponding path program 12 times [2022-11-18 19:46:26,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:26,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45287397] [2022-11-18 19:46:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:46:26,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:26,285 INFO L229 MonitoredProcess]: Starting monitored process 268 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:26,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (268)] Waiting until timeout for monitored process [2022-11-18 19:46:26,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:46:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 19:46:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:27,085 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:27,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:27,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:29,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45287397] [2022-11-18 19:46:29,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45287397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:29,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:29,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 19:46:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148800586] [2022-11-18 19:46:29,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:29,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:46:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:46:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:46:29,592 INFO L87 Difference]: Start difference. First operand 11471 states and 57618 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:38,096 INFO L93 Difference]: Finished difference Result 16077 states and 79888 transitions. [2022-11-18 19:46:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 19:46:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 19:46:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:38,168 INFO L225 Difference]: With dead ends: 16077 [2022-11-18 19:46:38,168 INFO L226 Difference]: Without dead ends: 16077 [2022-11-18 19:46:38,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:46:38,168 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:38,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 35 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 466 Invalid, 0 Unknown, 77 Unchecked, 4.8s Time] [2022-11-18 19:46:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2022-11-18 19:46:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 11983. [2022-11-18 19:46:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11983 states, 11978 states have (on average 5.047336784104191) internal successors, (60457), 11982 states have internal predecessors, (60457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11983 states to 11983 states and 60457 transitions. [2022-11-18 19:46:38,553 INFO L78 Accepts]: Start accepts. Automaton has 11983 states and 60457 transitions. Word has length 15 [2022-11-18 19:46:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:38,553 INFO L495 AbstractCegarLoop]: Abstraction has 11983 states and 60457 transitions. [2022-11-18 19:46:38,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 11983 states and 60457 transitions. [2022-11-18 19:46:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:38,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:38,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:38,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (268)] Ended with exit code 0 [2022-11-18 19:46:38,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:38,761 INFO L420 AbstractCegarLoop]: === Iteration 268 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1610454774, now seen corresponding path program 7 times [2022-11-18 19:46:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:38,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852557559] [2022-11-18 19:46:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:46:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:38,762 INFO L229 MonitoredProcess]: Starting monitored process 269 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:38,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (269)] Waiting until timeout for monitored process [2022-11-18 19:46:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:46:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:39,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:46:39,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:46:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:40,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:46:42,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:46:42,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852557559] [2022-11-18 19:46:42,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852557559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:42,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:46:42,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-18 19:46:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938769673] [2022-11-18 19:46:42,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:42,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 19:46:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:46:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 19:46:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-18 19:46:42,147 INFO L87 Difference]: Start difference. First operand 11983 states and 60457 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) [2022-11-18 19:46:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:59,152 INFO L93 Difference]: Finished difference Result 19914 states and 95964 transitions. [2022-11-18 19:46:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 19:46:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 15 [2022-11-18 19:46:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:59,238 INFO L225 Difference]: With dead ends: 19914 [2022-11-18 19:46:59,239 INFO L226 Difference]: Without dead ends: 19914 [2022-11-18 19:46:59,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 19:46:59,239 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 852 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:59,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 16 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 918 Invalid, 0 Unknown, 184 Unchecked, 5.6s Time] [2022-11-18 19:46:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19914 states. [2022-11-18 19:46:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19914 to 13127. [2022-11-18 19:46:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13127 states, 13122 states have (on average 5.098384392623076) internal successors, (66901), 13126 states have internal predecessors, (66901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13127 states to 13127 states and 66901 transitions. [2022-11-18 19:46:59,725 INFO L78 Accepts]: Start accepts. Automaton has 13127 states and 66901 transitions. Word has length 15 [2022-11-18 19:46:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:59,725 INFO L495 AbstractCegarLoop]: Abstraction has 13127 states and 66901 transitions. [2022-11-18 19:46:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) [2022-11-18 19:46:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13127 states and 66901 transitions. [2022-11-18 19:46:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 19:46:59,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:59,732 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:59,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (269)] Ended with exit code 0 [2022-11-18 19:46:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:59,933 INFO L420 AbstractCegarLoop]: === Iteration 269 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-18 19:46:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1610414784, now seen corresponding path program 8 times [2022-11-18 19:46:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:46:59,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379563102] [2022-11-18 19:46:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:46:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:46:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:46:59,934 INFO L229 MonitoredProcess]: Starting monitored process 270 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:46:59,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e1d5096-4b6c-4402-94a9-547a89bc6dcf/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (270)] Waiting until timeout for monitored process [2022-11-18 19:47:00,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:47:00,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:47:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:47:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:00,744 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 19:47:00,744 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 19:47:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:47:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates...