./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:50:56,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:50:56,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:50:56,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:50:56,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:50:56,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:50:56,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:50:56,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:50:56,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:50:56,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:50:56,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:50:56,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:50:56,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:50:56,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:50:56,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:50:56,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:50:56,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:50:56,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:50:56,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:50:56,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:50:56,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:50:56,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:50:56,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:50:56,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:50:56,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:50:56,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:50:56,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:50:56,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:50:56,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:50:56,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:50:56,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:50:56,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:50:56,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:50:56,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:50:56,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:50:56,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:50:56,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:50:56,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:50:56,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:50:56,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:50:56,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:50:56,314 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:50:56,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:50:56,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:50:56,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:50:56,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:50:56,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:50:56,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:50:56,343 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:50:56,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:50:56,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:50:56,344 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:50:56,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:50:56,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:50:56,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:50:56,345 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:50:56,345 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:50:56,345 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:50:56,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:50:56,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:50:56,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:50:56,346 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:50:56,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:50:56,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:50:56,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:50:56,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:50:56,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:50:56,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:50:56,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:50:56,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:50:56,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:50:56,349 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_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-02 22:50:56,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:50:56,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:50:56,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:50:56,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:50:56,615 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:50:56,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-02 22:50:56,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/01bff041b/7b6cd776097f41c39b36df0215c9fa5f/FLAGeb6a2aa05 [2021-11-02 22:50:57,224 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:50:57,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-02 22:50:57,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/01bff041b/7b6cd776097f41c39b36df0215c9fa5f/FLAGeb6a2aa05 [2021-11-02 22:50:57,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/01bff041b/7b6cd776097f41c39b36df0215c9fa5f [2021-11-02 22:50:57,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:50:57,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:50:57,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:50:57,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:50:57,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:50:57,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:50:57" (1/1) ... [2021-11-02 22:50:57,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43de42eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:57, skipping insertion in model container [2021-11-02 22:50:57,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:50:57" (1/1) ... [2021-11-02 22:50:57,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:50:57,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:50:58,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:50:58,292 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-02 22:50:58,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47bd819a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:58, skipping insertion in model container [2021-11-02 22:50:58,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:50:58,293 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 22:50:58,295 INFO L168 Benchmark]: Toolchain (without parser) took 768.09 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 73.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:50:58,296 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:50:58,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.97 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 73.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:50:58,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 759.97 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 73.0 MB in the end (delta: -4.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:51:00,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:51:00,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:51:00,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:51:00,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:51:00,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:51:00,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:51:00,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:51:00,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:51:00,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:51:00,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:51:00,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:51:00,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:51:00,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:51:00,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:51:00,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:51:00,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:51:00,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:51:00,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:51:00,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:51:00,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:51:00,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:51:00,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:51:00,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:51:00,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:51:00,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:51:00,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:51:00,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:51:00,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:51:00,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:51:00,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:51:00,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:51:00,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:51:00,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:51:00,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:51:00,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:51:00,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:51:00,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:51:00,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:51:01,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:51:01,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:51:01,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:51:01,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:51:01,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:51:01,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:51:01,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:51:01,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:51:01,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:51:01,060 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:51:01,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:51:01,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:51:01,061 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:51:01,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:51:01,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:51:01,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:51:01,064 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:51:01,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:51:01,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:51:01,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:51:01,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:51:01,066 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:51:01,066 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:51:01,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:51:01,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:51:01,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:51:01,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:51:01,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:51:01,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:51:01,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:51:01,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:51:01,069 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:51:01,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:51:01,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:51:01,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:51:01,070 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_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-02 22:51:01,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:51:01,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:51:01,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:51:01,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:51:01,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:51:01,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-02 22:51:01,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/ebcdba603/daac647b6a4140259c08693a58e1ce13/FLAGa65db8311 [2021-11-02 22:51:02,356 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:51:02,357 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-02 22:51:02,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/ebcdba603/daac647b6a4140259c08693a58e1ce13/FLAGa65db8311 [2021-11-02 22:51:02,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/data/ebcdba603/daac647b6a4140259c08693a58e1ce13 [2021-11-02 22:51:02,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:51:02,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:51:02,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:51:02,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:51:02,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:51:02,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:51:02" (1/1) ... [2021-11-02 22:51:02,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df05bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:02, skipping insertion in model container [2021-11-02 22:51:02,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:51:02" (1/1) ... [2021-11-02 22:51:02,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:51:02,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:51:03,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:51:03,138 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 22:51:03,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:51:03,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:51:03,271 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:51:03,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:51:03,459 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:51:03,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03 WrapperNode [2021-11-02 22:51:03,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:51:03,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:51:03,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:51:03,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:51:03,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:51:03,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:51:03,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:51:03,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:51:03,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (1/1) ... [2021-11-02 22:51:03,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:51:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:03,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:51:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:51:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:51:03,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:51:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:51:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-02 22:51:03,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:51:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:51:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:51:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:51:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:51:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:51:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive [2021-11-02 22:51:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_positive [2021-11-02 22:51:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_del [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-11-02 22:51:03,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add_tail [2021-11-02 22:51:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-11-02 22:51:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_alloc [2021-11-02 22:51:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_fill [2021-11-02 22:51:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-11-02 22:51:03,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_msg [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_destroy_msgs [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_get_drvdata [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_atomic_add_return [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_atomic_sub_return [2021-11-02 22:51:03,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_sub [2021-11-02 22:51:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_init [2021-11-02 22:51:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_get [2021-11-02 22:51:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put [2021-11-02 22:51:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_del [2021-11-02 22:51:03,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_cleanup [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_release [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_put [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_get [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init_internal [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_init [2021-11-02 22:51:03,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kobject_create [2021-11-02 22:51:03,744 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-02 22:51:03,744 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-11-02 22:51:03,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_get_clientdata [2021-11-02 22:51:03,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2021-11-02 22:51:03,745 INFO L138 BoogieDeclarations]: Found implementation of procedure master_xfer [2021-11-02 22:51:03,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_transfer [2021-11-02 22:51:03,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_m88ts2022_rd_reg [2021-11-02 22:51:03,747 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_fix_12 [2021-11-02 22:51:03,747 INFO L138 BoogieDeclarations]: Found implementation of procedure free_12 [2021-11-02 22:51:03,747 INFO L138 BoogieDeclarations]: Found implementation of procedure entry_point [2021-11-02 22:51:03,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:51:03,747 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 22:51:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-02 22:51:03,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-02 22:51:03,748 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:51:03,748 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:51:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:51:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:51:03,749 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:51:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:51:03,750 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:51:03,751 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:51:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:51:03,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:51:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:51:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:51:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:51:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:51:03,753 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:51:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:51:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:51:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:51:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:51:03,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:51:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:51:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:51:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:51:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:51:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:51:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:51:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:51:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:51:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:51:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:51:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:51:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:51:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:51:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:51:03,761 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:51:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:51:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:51:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:51:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:51:03,780 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:51:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:51:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:51:03,782 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:51:03,782 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:51:03,785 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:51:03,785 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:51:03,786 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:51:03,786 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:51:03,787 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:51:03,787 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:51:03,788 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:51:03,788 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:51:03,789 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:51:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:51:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:51:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:51:03,796 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:51:03,797 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:51:03,798 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:51:03,799 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-02 22:51:03,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_positive [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-02 22:51:03,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-02 22:51:03,802 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_del [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add_tail [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_alloc [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_fill [2021-11-02 22:51:03,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_msg [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_destroy_msgs [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_get_drvdata [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-02 22:51:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_atomic_add_return [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_atomic_sub_return [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_sub [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:51:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_init [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_get [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_del [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_cleanup [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_release [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_put [2021-11-02 22:51:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_get [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init_internal [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_init [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kobject_create [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-02 22:51:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_get_clientdata [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure master_xfer [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_transfer [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-02 22:51:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_m88ts2022_rd_reg [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_fix_12 [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:51:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure free_12 [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure entry_point [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:51:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-02 22:51:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-02 22:51:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-02 22:51:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-02 22:51:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 22:51:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 22:51:04,540 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:51:05,096 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:51:06,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:51:06,081 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-02 22:51:06,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:51:06 BoogieIcfgContainer [2021-11-02 22:51:06,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:51:06,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:51:06,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:51:06,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:51:06,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:51:02" (1/3) ... [2021-11-02 22:51:06,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9f79b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:51:06, skipping insertion in model container [2021-11-02 22:51:06,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:51:03" (2/3) ... [2021-11-02 22:51:06,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9f79b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:51:06, skipping insertion in model container [2021-11-02 22:51:06,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:51:06" (3/3) ... [2021-11-02 22:51:06,093 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2021-11-02 22:51:06,100 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:51:06,100 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 146 error locations. [2021-11-02 22:51:06,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:51:06,167 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:51:06,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 146 error locations. [2021-11-02 22:51:06,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 408 states, 212 states have (on average 1.7311320754716981) internal successors, (367), 341 states have internal predecessors, (367), 40 states have call successors, (40), 29 states have call predecessors, (40), 29 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-02 22:51:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:51:06,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:06,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:06,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_destroy_msgsErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1947470556, now seen corresponding path program 1 times [2021-11-02 22:51:06,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:06,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121993627] [2021-11-02 22:51:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:06,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:06,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:06,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:51:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:51:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:06,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:06,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:06,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121993627] [2021-11-02 22:51:06,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121993627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:06,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:51:06,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16081960] [2021-11-02 22:51:06,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:51:06,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:51:06,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:06,876 INFO L87 Difference]: Start difference. First operand has 408 states, 212 states have (on average 1.7311320754716981) internal successors, (367), 341 states have internal predecessors, (367), 40 states have call successors, (40), 29 states have call predecessors, (40), 29 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:51:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:07,126 INFO L93 Difference]: Finished difference Result 439 states and 497 transitions. [2021-11-02 22:51:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:51:07,129 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-02 22:51:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:07,157 INFO L225 Difference]: With dead ends: 439 [2021-11-02 22:51:07,157 INFO L226 Difference]: Without dead ends: 436 [2021-11-02 22:51:07,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-02 22:51:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 374. [2021-11-02 22:51:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 193 states have (on average 1.7512953367875648) internal successors, (338), 316 states have internal predecessors, (338), 35 states have call successors, (35), 25 states have call predecessors, (35), 25 states have return successors, (42), 35 states have call predecessors, (42), 34 states have call successors, (42) [2021-11-02 22:51:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 415 transitions. [2021-11-02 22:51:07,305 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 415 transitions. Word has length 16 [2021-11-02 22:51:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:07,305 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 415 transitions. [2021-11-02 22:51:07,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-02 22:51:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 415 transitions. [2021-11-02 22:51:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:51:07,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:07,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:07,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:07,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:07,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_destroy_msgsErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -604686405, now seen corresponding path program 1 times [2021-11-02 22:51:07,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:07,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312366399] [2021-11-02 22:51:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:07,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:07,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:07,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:51:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:51:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:07,799 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-02 22:51:07,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-02 22:51:08,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:51:08,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 22 [2021-11-02 22:51:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:08,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:08,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:08,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312366399] [2021-11-02 22:51:08,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312366399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:08,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:08,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:51:08,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419727587] [2021-11-02 22:51:08,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:51:08,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:51:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:51:08,393 INFO L87 Difference]: Start difference. First operand 374 states and 415 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:10,034 INFO L93 Difference]: Finished difference Result 636 states and 714 transitions. [2021-11-02 22:51:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:51:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16 [2021-11-02 22:51:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:10,042 INFO L225 Difference]: With dead ends: 636 [2021-11-02 22:51:10,042 INFO L226 Difference]: Without dead ends: 631 [2021-11-02 22:51:10,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:51:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-02 22:51:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 446. [2021-11-02 22:51:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 246 states have (on average 1.7195121951219512) internal successors, (423), 370 states have internal predecessors, (423), 43 states have call successors, (43), 33 states have call predecessors, (43), 37 states have return successors, (58), 45 states have call predecessors, (58), 42 states have call successors, (58) [2021-11-02 22:51:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 524 transitions. [2021-11-02 22:51:10,074 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 524 transitions. Word has length 16 [2021-11-02 22:51:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 524 transitions. [2021-11-02 22:51:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 524 transitions. [2021-11-02 22:51:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:51:10,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:10,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:10,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:10,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:10,286 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_destroy_msgsErr1REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -604686404, now seen corresponding path program 1 times [2021-11-02 22:51:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065422026] [2021-11-02 22:51:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:10,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:10,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:10,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:10,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:51:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:51:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:10,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-02 22:51:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:11,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:11,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065422026] [2021-11-02 22:51:11,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065422026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:11,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:11,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:51:11,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895572718] [2021-11-02 22:51:11,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:51:11,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:11,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:51:11,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:51:11,085 INFO L87 Difference]: Start difference. First operand 446 states and 524 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:13,715 INFO L93 Difference]: Finished difference Result 671 states and 789 transitions. [2021-11-02 22:51:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:51:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16 [2021-11-02 22:51:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:13,725 INFO L225 Difference]: With dead ends: 671 [2021-11-02 22:51:13,725 INFO L226 Difference]: Without dead ends: 671 [2021-11-02 22:51:13,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:51:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-11-02 22:51:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 527. [2021-11-02 22:51:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 312 states have (on average 1.7403846153846154) internal successors, (543), 438 states have internal predecessors, (543), 51 states have call successors, (51), 39 states have call predecessors, (51), 44 states have return successors, (70), 52 states have call predecessors, (70), 50 states have call successors, (70) [2021-11-02 22:51:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 664 transitions. [2021-11-02 22:51:13,760 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 664 transitions. Word has length 16 [2021-11-02 22:51:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:13,761 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 664 transitions. [2021-11-02 22:51:13,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 664 transitions. [2021-11-02 22:51:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:51:13,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:13,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:13,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:13,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:13,985 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_destroy_msgsErr2REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1283043716, now seen corresponding path program 1 times [2021-11-02 22:51:13,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:13,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028150874] [2021-11-02 22:51:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:13,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:13,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:13,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:13,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:51:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:51:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:14,227 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-02 22:51:14,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-02 22:51:14,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:51:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 23 [2021-11-02 22:51:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 24 [2021-11-02 22:51:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:14,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:14,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028150874] [2021-11-02 22:51:14,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028150874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:14,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:14,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-02 22:51:14,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171559466] [2021-11-02 22:51:14,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:14,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:15,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:15,000 INFO L87 Difference]: Start difference. First operand 527 states and 664 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:17,994 INFO L93 Difference]: Finished difference Result 616 states and 768 transitions. [2021-11-02 22:51:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:51:17,994 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), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-11-02 22:51:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:17,999 INFO L225 Difference]: With dead ends: 616 [2021-11-02 22:51:18,000 INFO L226 Difference]: Without dead ends: 616 [2021-11-02 22:51:18,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:51:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-02 22:51:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 537. [2021-11-02 22:51:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 319 states have (on average 1.7272727272727273) internal successors, (551), 446 states have internal predecessors, (551), 51 states have call successors, (51), 41 states have call predecessors, (51), 47 states have return successors, (70), 52 states have call predecessors, (70), 50 states have call successors, (70) [2021-11-02 22:51:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 672 transitions. [2021-11-02 22:51:18,030 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 672 transitions. Word has length 18 [2021-11-02 22:51:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:18,030 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 672 transitions. [2021-11-02 22:51:18,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 672 transitions. [2021-11-02 22:51:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:51:18,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:18,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:18,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:18,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:18,244 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_destroy_msgsErr3REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1283043715, now seen corresponding path program 1 times [2021-11-02 22:51:18,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:18,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233075443] [2021-11-02 22:51:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:18,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:18,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:51:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:51:18,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:18,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-02 22:51:18,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 26 [2021-11-02 22:51:18,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-02 22:51:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:18,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:19,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:19,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233075443] [2021-11-02 22:51:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233075443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:19,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:19,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-02 22:51:19,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360477219] [2021-11-02 22:51:19,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:51:19,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:51:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:51:19,676 INFO L87 Difference]: Start difference. First operand 537 states and 672 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:25,751 INFO L93 Difference]: Finished difference Result 640 states and 801 transitions. [2021-11-02 22:51:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:51:25,753 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), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-11-02 22:51:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:25,758 INFO L225 Difference]: With dead ends: 640 [2021-11-02 22:51:25,759 INFO L226 Difference]: Without dead ends: 640 [2021-11-02 22:51:25,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:51:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-02 22:51:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 552. [2021-11-02 22:51:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 331 states have (on average 1.7190332326283988) internal successors, (569), 460 states have internal predecessors, (569), 52 states have call successors, (52), 42 states have call predecessors, (52), 49 states have return successors, (74), 52 states have call predecessors, (74), 51 states have call successors, (74) [2021-11-02 22:51:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 695 transitions. [2021-11-02 22:51:25,790 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 695 transitions. Word has length 18 [2021-11-02 22:51:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:25,790 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 695 transitions. [2021-11-02 22:51:25,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:51:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 695 transitions. [2021-11-02 22:51:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:51:25,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:25,793 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:25,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:26,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting entry_pointErr22ASSERT_VIOLATIONMEMORY_FREE === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1609617441, now seen corresponding path program 1 times [2021-11-02 22:51:26,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:26,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490090594] [2021-11-02 22:51:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:26,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:26,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:26,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:26,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:51:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:51:26,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:51:26,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:51:26,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490090594] [2021-11-02 22:51:26,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490090594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:26,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:51:26,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:51:26,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868367033] [2021-11-02 22:51:26,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:51:26,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:51:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:26,393 INFO L87 Difference]: Start difference. First operand 552 states and 695 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:51:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:26,480 INFO L93 Difference]: Finished difference Result 613 states and 770 transitions. [2021-11-02 22:51:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:51:26,481 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-02 22:51:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:26,486 INFO L225 Difference]: With dead ends: 613 [2021-11-02 22:51:26,486 INFO L226 Difference]: Without dead ends: 613 [2021-11-02 22:51:26,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:51:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-02 22:51:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 554. [2021-11-02 22:51:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 333 states have (on average 1.7147147147147148) internal successors, (571), 461 states have internal predecessors, (571), 52 states have call successors, (52), 42 states have call predecessors, (52), 49 states have return successors, (74), 53 states have call predecessors, (74), 51 states have call successors, (74) [2021-11-02 22:51:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 697 transitions. [2021-11-02 22:51:26,523 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 697 transitions. Word has length 21 [2021-11-02 22:51:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:26,524 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 697 transitions. [2021-11-02 22:51:26,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:51:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 697 transitions. [2021-11-02 22:51:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:51:26,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:26,526 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:26,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:26,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:26,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting entry_pointErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1609617450, now seen corresponding path program 1 times [2021-11-02 22:51:26,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:26,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825576417] [2021-11-02 22:51:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:26,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:26,742 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:26,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:51:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:51:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:27,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:27,234 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 22:51:27,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-02 22:51:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:27,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:27,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:27,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825576417] [2021-11-02 22:51:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825576417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:51:27,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-02 22:51:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155519997] [2021-11-02 22:51:27,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:51:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:51:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:51:27,502 INFO L87 Difference]: Start difference. First operand 554 states and 697 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:51:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:31,814 INFO L93 Difference]: Finished difference Result 822 states and 1006 transitions. [2021-11-02 22:51:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:51:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2021-11-02 22:51:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:31,819 INFO L225 Difference]: With dead ends: 822 [2021-11-02 22:51:31,819 INFO L226 Difference]: Without dead ends: 822 [2021-11-02 22:51:31,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:51:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-11-02 22:51:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 618. [2021-11-02 22:51:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 384 states have (on average 1.6953125) internal successors, (651), 509 states have internal predecessors, (651), 62 states have call successors, (62), 46 states have call predecessors, (62), 55 states have return successors, (95), 66 states have call predecessors, (95), 61 states have call successors, (95) [2021-11-02 22:51:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 808 transitions. [2021-11-02 22:51:31,849 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 808 transitions. Word has length 21 [2021-11-02 22:51:31,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:31,850 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 808 transitions. [2021-11-02 22:51:31,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-02 22:51:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 808 transitions. [2021-11-02 22:51:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:51:31,857 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:31,857 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:31,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:51:32,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:51:32,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting entry_pointErr1REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:51:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1609617449, now seen corresponding path program 1 times [2021-11-02 22:51:32,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:51:32,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654848594] [2021-11-02 22:51:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:32,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:51:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:51:32,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:51:32,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:51:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:51:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:32,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:51:34,741 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:51:34,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 22:51:34,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:51:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2021-11-02 22:51:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:34,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:39,016 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~client~0.base_BEFORE_CALL_4 (_ BitVec 32)) (|v_ldv_malloc_#res.base_41| (_ BitVec 32)) (v_entry_point_~client~0.offset_BEFORE_CALL_2 (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2) (select (store |c_#length| |v_ldv_malloc_#res.base_41| ldv_malloc_~size) v_entry_point_~client~0.base_BEFORE_CALL_4))) (bvule v_entry_point_~client~0.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_41|)))))) (exists ((|v_ldv_malloc_#res.base_40| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_37 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_40| v_ldv_malloc_~size_37) v_entry_point_~client~0.base_BEFORE_CALL_4)))) (not (bvule v_entry_point_~client~0.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_40|))))))))) is different from true [2021-11-02 22:51:40,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 27 [2021-11-02 22:51:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-02 22:51:40,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:51:40,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654848594] [2021-11-02 22:51:40,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654848594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:51:40,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:40,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-02 22:51:40,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686203884] [2021-11-02 22:51:40,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:51:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:51:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:51:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=175, Unknown=2, NotChecked=26, Total=240 [2021-11-02 22:51:40,498 INFO L87 Difference]: Start difference. First operand 618 states and 808 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:51:59,523 WARN L207 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-11-02 22:52:03,633 WARN L838 $PredicateComparison]: unable to prove that (and (or (not (= (_ bv20 32) |c_ldv_malloc_#in~size|)) (forall ((|v_ldv_malloc_#res.base_40| (_ BitVec 32))) (or (and (forall ((v_ldv_malloc_~size_37 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) |c_ldv_malloc_#res.offset|) (select (store |c_#length| |v_ldv_malloc_#res.base_40| v_ldv_malloc_~size_37) |c_ldv_malloc_#res.base|))) (bvule |c_ldv_malloc_#res.offset| (bvadd (_ bv4 32) |c_ldv_malloc_#res.offset|))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_40|)))))))) (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (= |c_#length| |c_old(#length)|) (forall ((v_entry_point_~client~0.base_BEFORE_CALL_4 (_ BitVec 32)) (|v_ldv_malloc_#res.base_41| (_ BitVec 32)) (v_entry_point_~client~0.offset_BEFORE_CALL_2 (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2) (select (store |c_#length| |v_ldv_malloc_#res.base_41| ldv_malloc_~size) v_entry_point_~client~0.base_BEFORE_CALL_4))) (bvule v_entry_point_~client~0.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_41|)))))) (exists ((|v_ldv_malloc_#res.base_40| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_37 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_40| v_ldv_malloc_~size_37) v_entry_point_~client~0.base_BEFORE_CALL_4)))) (not (bvule v_entry_point_~client~0.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~client~0.offset_BEFORE_CALL_2)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_40|)))))))))) is different from false [2021-11-02 22:55:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:51,546 INFO L93 Difference]: Finished difference Result 749 states and 959 transitions. [2021-11-02 22:55:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:55:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2021-11-02 22:55:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:51,553 INFO L225 Difference]: With dead ends: 749 [2021-11-02 22:55:51,554 INFO L226 Difference]: Without dead ends: 749 [2021-11-02 22:55:51,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=102, Invalid=499, Unknown=7, NotChecked=94, Total=702 [2021-11-02 22:55:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-02 22:55:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 642. [2021-11-02 22:55:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 402 states have (on average 1.681592039800995) internal successors, (676), 529 states have internal predecessors, (676), 63 states have call successors, (63), 49 states have call predecessors, (63), 60 states have return successors, (97), 67 states have call predecessors, (97), 62 states have call successors, (97) [2021-11-02 22:55:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 836 transitions. [2021-11-02 22:55:51,585 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 836 transitions. Word has length 21 [2021-11-02 22:55:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:51,586 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 836 transitions. [2021-11-02 22:55:51,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:55:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 836 transitions. [2021-11-02 22:55:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:55:51,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:51,588 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:51,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:51,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:51,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting entry_pointErr22ASSERT_VIOLATIONMEMORY_FREE === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1580988290, now seen corresponding path program 1 times [2021-11-02 22:55:51,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:51,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443014254] [2021-11-02 22:55:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:51,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:51,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:51,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:51,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:55:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:55:52,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:52,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:52,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:52,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443014254] [2021-11-02 22:55:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443014254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:55:52,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-02 22:55:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347732903] [2021-11-02 22:55:52,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:52,313 INFO L87 Difference]: Start difference. First operand 642 states and 836 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:55:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:52,386 INFO L93 Difference]: Finished difference Result 641 states and 832 transitions. [2021-11-02 22:55:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:55:52,387 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), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-02 22:55:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:52,392 INFO L225 Difference]: With dead ends: 641 [2021-11-02 22:55:52,393 INFO L226 Difference]: Without dead ends: 641 [2021-11-02 22:55:52,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:52,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-02 22:55:52,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 634. [2021-11-02 22:55:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 396 states have (on average 1.6717171717171717) internal successors, (662), 522 states have internal predecessors, (662), 62 states have call successors, (62), 49 states have call predecessors, (62), 60 states have return successors, (95), 66 states have call predecessors, (95), 61 states have call successors, (95) [2021-11-02 22:55:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 819 transitions. [2021-11-02 22:55:52,426 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 819 transitions. Word has length 21 [2021-11-02 22:55:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:52,426 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 819 transitions. [2021-11-02 22:55:52,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:55:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 819 transitions. [2021-11-02 22:55:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:55:52,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:52,428 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:52,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:52,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:52,644 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting entry_pointErr1REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1580988298, now seen corresponding path program 1 times [2021-11-02 22:55:52,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:52,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467649743] [2021-11-02 22:55:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:52,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:52,647 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:55:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:52,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:55:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:53,204 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467649743] [2021-11-02 22:55:53,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467649743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:53,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:53,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:55:53,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019851174] [2021-11-02 22:55:53,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:53,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:53,207 INFO L87 Difference]: Start difference. First operand 634 states and 819 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:55:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:53,275 INFO L93 Difference]: Finished difference Result 601 states and 751 transitions. [2021-11-02 22:55:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:55:53,276 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-02 22:55:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:53,281 INFO L225 Difference]: With dead ends: 601 [2021-11-02 22:55:53,281 INFO L226 Difference]: Without dead ends: 601 [2021-11-02 22:55:53,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-02 22:55:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 593. [2021-11-02 22:55:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 362 states have (on average 1.6574585635359116) internal successors, (600), 486 states have internal predecessors, (600), 58 states have call successors, (58), 47 states have call predecessors, (58), 57 states have return successors, (85), 63 states have call predecessors, (85), 57 states have call successors, (85) [2021-11-02 22:55:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 743 transitions. [2021-11-02 22:55:53,306 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 743 transitions. Word has length 21 [2021-11-02 22:55:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:53,307 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 743 transitions. [2021-11-02 22:55:53,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:55:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 743 transitions. [2021-11-02 22:55:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:55:53,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:53,309 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:53,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:53,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:53,524 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting entry_pointErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1903020457, now seen corresponding path program 1 times [2021-11-02 22:55:53,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:53,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105869786] [2021-11-02 22:55:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:53,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:53,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:55:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:55:53,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:53,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:54,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:54,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105869786] [2021-11-02 22:55:54,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105869786] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:54,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:54,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-02 22:55:54,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360039850] [2021-11-02 22:55:54,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:54,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:54,132 INFO L87 Difference]: Start difference. First operand 593 states and 743 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:55:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:54,214 INFO L93 Difference]: Finished difference Result 550 states and 679 transitions. [2021-11-02 22:55:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:55:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2021-11-02 22:55:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:54,220 INFO L225 Difference]: With dead ends: 550 [2021-11-02 22:55:54,220 INFO L226 Difference]: Without dead ends: 550 [2021-11-02 22:55:54,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-02 22:55:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-11-02 22:55:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 329 states have (on average 1.662613981762918) internal successors, (547), 451 states have internal predecessors, (547), 53 states have call successors, (53), 42 states have call predecessors, (53), 52 states have return successors, (77), 58 states have call predecessors, (77), 52 states have call successors, (77) [2021-11-02 22:55:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 677 transitions. [2021-11-02 22:55:54,242 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 677 transitions. Word has length 21 [2021-11-02 22:55:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:54,243 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 677 transitions. [2021-11-02 22:55:54,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:55:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 677 transitions. [2021-11-02 22:55:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:55:54,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:54,246 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:54,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:54,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:54,469 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting entry_pointErr23ASSERT_VIOLATIONMEMORY_FREE === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1765996063, now seen corresponding path program 1 times [2021-11-02 22:55:54,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:54,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723543021] [2021-11-02 22:55:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:54,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:54,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:54,471 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:54,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:55:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:55:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:55,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:55:55,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:55,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723543021] [2021-11-02 22:55:55,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723543021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:55:55,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:55,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-11-02 22:55:55,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575546571] [2021-11-02 22:55:55,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:55:55,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:55:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:55,501 INFO L87 Difference]: Start difference. First operand 548 states and 677 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:55:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:56,919 INFO L93 Difference]: Finished difference Result 569 states and 678 transitions. [2021-11-02 22:55:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:55:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 22 [2021-11-02 22:55:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:56,925 INFO L225 Difference]: With dead ends: 569 [2021-11-02 22:55:56,925 INFO L226 Difference]: Without dead ends: 569 [2021-11-02 22:55:56,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:55:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-02 22:55:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 547. [2021-11-02 22:55:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 329 states have (on average 1.656534954407295) internal successors, (545), 450 states have internal predecessors, (545), 53 states have call successors, (53), 42 states have call predecessors, (53), 52 states have return successors, (77), 58 states have call predecessors, (77), 52 states have call successors, (77) [2021-11-02 22:55:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 675 transitions. [2021-11-02 22:55:56,968 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 675 transitions. Word has length 22 [2021-11-02 22:55:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:56,968 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 675 transitions. [2021-11-02 22:55:56,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-02 22:55:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 675 transitions. [2021-11-02 22:55:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:55:56,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:56,970 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:56,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:57,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:57,183 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1984782888, now seen corresponding path program 1 times [2021-11-02 22:55:57,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:57,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174176041] [2021-11-02 22:55:57,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:57,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:57,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:57,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:55:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:55:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:57,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-11-02 22:55:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-11-02 22:55:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:58,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:58,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:58,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174176041] [2021-11-02 22:55:58,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174176041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:58,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:58,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-02 22:55:58,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204839810] [2021-11-02 22:55:58,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:55:58,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:55:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:55:58,467 INFO L87 Difference]: Start difference. First operand 547 states and 675 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:55:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:59,676 INFO L93 Difference]: Finished difference Result 510 states and 604 transitions. [2021-11-02 22:55:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:55:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2021-11-02 22:55:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:59,682 INFO L225 Difference]: With dead ends: 510 [2021-11-02 22:55:59,682 INFO L226 Difference]: Without dead ends: 499 [2021-11-02 22:55:59,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:55:59,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-02 22:55:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 491. [2021-11-02 22:55:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 287 states have (on average 1.6550522648083623) internal successors, (475), 407 states have internal predecessors, (475), 47 states have call successors, (47), 36 states have call predecessors, (47), 44 states have return successors, (68), 51 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 22:55:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 590 transitions. [2021-11-02 22:55:59,702 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 590 transitions. Word has length 23 [2021-11-02 22:55:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:59,702 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 590 transitions. [2021-11-02 22:55:59,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-02 22:55:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 590 transitions. [2021-11-02 22:55:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:55:59,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:59,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:59,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:59,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:59,919 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_destroy_msgsErr0REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:55:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2091962744, now seen corresponding path program 1 times [2021-11-02 22:55:59,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:59,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639912266] [2021-11-02 22:55:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:59,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:59,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:59,922 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:59,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:56:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:56:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:00,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-02 22:56:00,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-02 22:56:00,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:56:00,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 24 [2021-11-02 22:56:00,793 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-02 22:56:00,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 46 [2021-11-02 22:56:01,273 INFO L354 Elim1Store]: treesize reduction 2, result has 92.0 percent of original size [2021-11-02 22:56:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 77 [2021-11-02 22:56:02,547 INFO L354 Elim1Store]: treesize reduction 31, result has 50.8 percent of original size [2021-11-02 22:56:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 85 [2021-11-02 22:56:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:56:04,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:56:05,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:05,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639912266] [2021-11-02 22:56:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639912266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:56:05,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:05,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-11-02 22:56:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700085750] [2021-11-02 22:56:05,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:56:05,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:56:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:56:05,484 INFO L87 Difference]: Start difference. First operand 491 states and 590 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:56:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:52,422 INFO L93 Difference]: Finished difference Result 594 states and 683 transitions. [2021-11-02 22:56:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:56:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-11-02 22:56:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:52,427 INFO L225 Difference]: With dead ends: 594 [2021-11-02 22:56:52,427 INFO L226 Difference]: Without dead ends: 594 [2021-11-02 22:56:52,428 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:56:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-02 22:56:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 495. [2021-11-02 22:56:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 290 states have (on average 1.6482758620689655) internal successors, (478), 410 states have internal predecessors, (478), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 51 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 22:56:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 593 transitions. [2021-11-02 22:56:52,446 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 593 transitions. Word has length 26 [2021-11-02 22:56:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:52,447 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 593 transitions. [2021-11-02 22:56:52,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:56:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 593 transitions. [2021-11-02 22:56:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:56:52,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:52,448 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:52,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-02 22:56:52,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:52,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_destroy_msgsErr1REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 22:56:52,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2091962745, now seen corresponding path program 1 times [2021-11-02 22:56:52,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:52,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911824284] [2021-11-02 22:56:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:52,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:52,668 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:52,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:56:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:53,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:56:53,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:53,113 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-02 22:56:53,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-02 22:56:53,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:56:53,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:56:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 22 [2021-11-02 22:56:53,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-02 22:56:55,563 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:56:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-02 22:56:55,596 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-11-02 22:56:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 40 [2021-11-02 22:56:55,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2021-11-02 22:56:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:57,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:57:10,326 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-02 22:57:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:15,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:57:15,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911824284] [2021-11-02 22:57:15,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911824284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:57:15,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:57:15,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-02 22:57:15,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906987423] [2021-11-02 22:57:15,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:57:15,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:57:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:57:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=88, Unknown=6, NotChecked=0, Total=132 [2021-11-02 22:57:15,216 INFO L87 Difference]: Start difference. First operand 495 states and 593 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 22:58:26,197 WARN L207 SmtUtils]: Spent 10.51 s on a formula simplification that was a NOOP. DAG size: 47 [2021-11-02 23:02:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:11,420 INFO L93 Difference]: Finished difference Result 627 states and 714 transitions. [2021-11-02 23:02:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:02:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-11-02 23:02:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:11,425 INFO L225 Difference]: With dead ends: 627 [2021-11-02 23:02:11,425 INFO L226 Difference]: Without dead ends: 627 [2021-11-02 23:02:11,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=175, Invalid=313, Unknown=18, NotChecked=0, Total=506 [2021-11-02 23:02:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-02 23:02:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 494. [2021-11-02 23:02:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 290 states have (on average 1.6413793103448275) internal successors, (476), 409 states have internal predecessors, (476), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 51 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 23:02:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 591 transitions. [2021-11-02 23:02:11,444 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 591 transitions. Word has length 26 [2021-11-02 23:02:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:11,445 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 591 transitions. [2021-11-02 23:02:11,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 5 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-02 23:02:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 591 transitions. [2021-11-02 23:02:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:02:11,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:11,446 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:11,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:11,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:11,661 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_destroy_msgsErr2REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 23:02:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 331508985, now seen corresponding path program 1 times [2021-11-02 23:02:11,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:11,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859002178] [2021-11-02 23:02:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:11,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:11,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:11,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 23:02:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:02:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 15 [2021-11-02 23:02:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:02:12,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:12,391 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-02 23:02:12,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 21 [2021-11-02 23:02:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:02:12,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:12,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859002178] [2021-11-02 23:02:12,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859002178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:12,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:12,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:02:12,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989390687] [2021-11-02 23:02:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:02:12,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:02:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:02:12,546 INFO L87 Difference]: Start difference. First operand 494 states and 591 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:02:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:13,715 INFO L93 Difference]: Finished difference Result 504 states and 601 transitions. [2021-11-02 23:02:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:02:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-02 23:02:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:13,719 INFO L225 Difference]: With dead ends: 504 [2021-11-02 23:02:13,719 INFO L226 Difference]: Without dead ends: 504 [2021-11-02 23:02:13,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:02:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-02 23:02:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 494. [2021-11-02 23:02:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 290 states have (on average 1.6379310344827587) internal successors, (475), 409 states have internal predecessors, (475), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 51 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 23:02:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 590 transitions. [2021-11-02 23:02:13,743 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 590 transitions. Word has length 28 [2021-11-02 23:02:13,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:13,744 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 590 transitions. [2021-11-02 23:02:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:02:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 590 transitions. [2021-11-02 23:02:13,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:02:13,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:13,747 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:13,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:13,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:13,962 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_destroy_msgsErr3REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 23:02:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash 331508986, now seen corresponding path program 1 times [2021-11-02 23:02:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:13,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530015001] [2021-11-02 23:02:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:13,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:13,965 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 23:02:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:02:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:15,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 26 [2021-11-02 23:02:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-02 23:02:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:02:15,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:15,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:02:15,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 42 [2021-11-02 23:02:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:02:16,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:16,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530015001] [2021-11-02 23:02:16,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530015001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:16,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:16,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 23:02:16,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624139037] [2021-11-02 23:02:16,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:02:16,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:02:16,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:02:16,148 INFO L87 Difference]: Start difference. First operand 494 states and 590 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 23:02:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:18,916 INFO L93 Difference]: Finished difference Result 504 states and 601 transitions. [2021-11-02 23:02:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:02:18,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2021-11-02 23:02:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:18,920 INFO L225 Difference]: With dead ends: 504 [2021-11-02 23:02:18,921 INFO L226 Difference]: Without dead ends: 504 [2021-11-02 23:02:18,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:02:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-02 23:02:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 494. [2021-11-02 23:02:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 290 states have (on average 1.6344827586206896) internal successors, (474), 409 states have internal predecessors, (474), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 51 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 23:02:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 589 transitions. [2021-11-02 23:02:18,938 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 589 transitions. Word has length 28 [2021-11-02 23:02:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:18,939 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 589 transitions. [2021-11-02 23:02:18,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 23:02:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 589 transitions. [2021-11-02 23:02:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:02:18,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:18,940 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:18,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:19,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:19,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting entry_pointErr19ASSERT_VIOLATIONMEMORY_FREE === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 23:02:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -457736982, now seen corresponding path program 1 times [2021-11-02 23:02:19,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:19,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224220207] [2021-11-02 23:02:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:19,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:19,173 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 23:02:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:02:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:02:20,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:02:20,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:20,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224220207] [2021-11-02 23:02:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224220207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:20,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 23:02:20,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481312858] [2021-11-02 23:02:20,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:02:20,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:02:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:02:20,198 INFO L87 Difference]: Start difference. First operand 494 states and 589 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 23:02:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:20,280 INFO L93 Difference]: Finished difference Result 545 states and 651 transitions. [2021-11-02 23:02:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:02:20,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-02 23:02:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:20,287 INFO L225 Difference]: With dead ends: 545 [2021-11-02 23:02:20,288 INFO L226 Difference]: Without dead ends: 545 [2021-11-02 23:02:20,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:02:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-02 23:02:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 496. [2021-11-02 23:02:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 292 states have (on average 1.63013698630137) internal successors, (476), 410 states have internal predecessors, (476), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 52 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 23:02:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 591 transitions. [2021-11-02 23:02:20,314 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 591 transitions. Word has length 29 [2021-11-02 23:02:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:20,315 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 591 transitions. [2021-11-02 23:02:20,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-02 23:02:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 591 transitions. [2021-11-02 23:02:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:02:20,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:20,317 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:20,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:20,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:20,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting entry_pointErr2REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 23:02:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash -457736974, now seen corresponding path program 1 times [2021-11-02 23:02:20,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:20,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38450961] [2021-11-02 23:02:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:20,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:20,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:20,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 23:02:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:02:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:02:21,622 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-02 23:02:21,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-02 23:02:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:02:21,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:02:22,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:22,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38450961] [2021-11-02 23:02:22,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38450961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:02:22,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:22,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-02 23:02:22,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946981200] [2021-11-02 23:02:22,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:02:22,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:22,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:02:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:02:22,115 INFO L87 Difference]: Start difference. First operand 496 states and 591 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:02:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:28,542 INFO L93 Difference]: Finished difference Result 625 states and 715 transitions. [2021-11-02 23:02:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:02:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2021-11-02 23:02:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:28,547 INFO L225 Difference]: With dead ends: 625 [2021-11-02 23:02:28,548 INFO L226 Difference]: Without dead ends: 625 [2021-11-02 23:02:28,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:02:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-02 23:02:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 498. [2021-11-02 23:02:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 295 states have (on average 1.6271186440677967) internal successors, (480), 412 states have internal predecessors, (480), 47 states have call successors, (47), 37 states have call predecessors, (47), 45 states have return successors, (68), 52 states have call predecessors, (68), 46 states have call successors, (68) [2021-11-02 23:02:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 595 transitions. [2021-11-02 23:02:28,567 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 595 transitions. Word has length 29 [2021-11-02 23:02:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 595 transitions. [2021-11-02 23:02:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:02:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 595 transitions. [2021-11-02 23:02:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:02:28,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:28,569 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:28,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-02 23:02:28,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:28,790 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting entry_pointErr3REQUIRES_VIOLATION === [master_xferErr0REQUIRES_VIOLATION, master_xferErr1REQUIRES_VIOLATION, master_xferErr2REQUIRES_VIOLATION, master_xferErr3REQUIRES_VIOLATION (and 142 more)] === [2021-11-02 23:02:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash -457736973, now seen corresponding path program 1 times [2021-11-02 23:02:28,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:28,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009272689] [2021-11-02 23:02:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:28,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:28,792 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ef40fc6-9701-481b-bae4-1eef77956339/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 23:02:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:02:29,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:29,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:02:29,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:02:31,913 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:02:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 23:02:31,930 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:02:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2021-11-02 23:02:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:02:32,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:39,013 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_entry_point_~cfg~2.base_BEFORE_CALL_4 (_ BitVec 32)) (|v_ldv_malloc_#res.base_129| (_ BitVec 32)) (v_entry_point_~cfg~2.offset_BEFORE_CALL_2 (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_128| (_ BitVec 32))) (and (or (not (bvule v_entry_point_~cfg~2.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~cfg~2.offset_BEFORE_CALL_2))) (exists ((v_ldv_malloc_~size_119 (_ BitVec 32))) (not (bvule (bvadd (_ bv4 32) v_entry_point_~cfg~2.offset_BEFORE_CALL_2) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_128| v_ldv_malloc_~size_119) v_entry_point_~cfg~2.base_BEFORE_CALL_4))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_128|))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv4 32) v_entry_point_~cfg~2.offset_BEFORE_CALL_2) (select (store |c_#length| |v_ldv_malloc_#res.base_129| ldv_malloc_~size) v_entry_point_~cfg~2.base_BEFORE_CALL_4))) (bvule v_entry_point_~cfg~2.offset_BEFORE_CALL_2 (bvadd (_ bv4 32) v_entry_point_~cfg~2.offset_BEFORE_CALL_2))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_129|))))) is different from true [2021-11-02 23:02:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-02 23:02:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-02 23:02:41,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:41,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009272689] [2021-11-02 23:02:41,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009272689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:02:41,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:41,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-02 23:02:41,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310266915] [2021-11-02 23:02:41,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:02:41,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:02:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=174, Unknown=3, NotChecked=26, Total=240 [2021-11-02 23:02:41,263 INFO L87 Difference]: Start difference. First operand 498 states and 595 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6)