./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS --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 b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:28:18,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:28:18,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:28:18,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:28:18,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:28:18,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:28:18,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:28:18,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:28:18,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:28:18,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:28:18,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:28:18,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:28:18,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:28:18,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:28:18,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:28:18,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:28:18,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:28:18,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:28:18,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:28:18,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:28:18,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:28:18,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:28:18,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:28:18,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:28:18,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:28:18,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:28:18,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:28:18,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:28:18,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:28:18,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:28:18,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:28:18,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:28:18,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:28:18,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:28:18,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:28:18,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:28:18,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:28:18,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:28:18,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:28:18,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:28:18,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:28:18,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:28:18,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:28:18,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:28:18,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:28:18,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:28:18,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:28:18,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:28:18,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:28:18,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:28:18,428 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:28:18,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:28:18,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:28:18,429 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:28:18,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:28:18,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:28:18,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:28:18,430 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:28:18,430 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:28:18,430 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:28:18,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:28:18,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:28:18,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:28:18,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:28:18,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:28:18,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:28:18,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:28:18,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:28:18,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:28:18,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:28:18,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:28:18,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:28:18,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:28:18,433 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:28:18,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:28:18,434 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2022-11-23 03:28:18,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:28:18,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:28:18,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:28:18,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:28:18,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:28:18,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-23 03:28:21,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:28:22,127 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:28:22,128 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-23 03:28:22,143 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/data/9e7778eb8/78b1b4b0cc3342118eeeaa8e312e3520/FLAG634dd6a2e [2022-11-23 03:28:22,162 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/data/9e7778eb8/78b1b4b0cc3342118eeeaa8e312e3520 [2022-11-23 03:28:22,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:28:22,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:28:22,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:28:22,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:28:22,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:28:22,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41421836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22, skipping insertion in model container [2022-11-23 03:28:22,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:28:22,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:28:22,553 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-23 03:28:22,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:28:22,574 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:28:22,664 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-23 03:28:22,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:28:22,704 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:28:22,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22 WrapperNode [2022-11-23 03:28:22,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:28:22,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:28:22,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:28:22,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:28:22,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,798 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2022-11-23 03:28:22,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:28:22,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:28:22,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:28:22,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:28:22,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:28:22,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:28:22,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:28:22,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:28:22,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (1/1) ... [2022-11-23 03:28:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:28:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:22,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:28:22,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:28:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:28:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:28:22,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:28:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:28:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 03:28:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 03:28:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:28:22,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 03:28:22,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:28:22,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:28:22,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:28:23,159 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:28:23,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:28:23,520 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:28:23,527 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:28:23,541 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 03:28:23,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:23 BoogieIcfgContainer [2022-11-23 03:28:23,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:28:23,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:28:23,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:28:23,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:28:23,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:28:22" (1/3) ... [2022-11-23 03:28:23,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0cd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:23, skipping insertion in model container [2022-11-23 03:28:23,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:22" (2/3) ... [2022-11-23 03:28:23,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c0cd01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:28:23, skipping insertion in model container [2022-11-23 03:28:23,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:28:23" (3/3) ... [2022-11-23 03:28:23,556 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2022-11-23 03:28:23,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:28:23,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-23 03:28:23,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:28:23,647 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f7970ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:28:23,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-23 03:28:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 03:28:23,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:23,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:28:23,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2022-11-23 03:28:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:23,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915026089] [2022-11-23 03:28:23,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:23,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915026089] [2022-11-23 03:28:23,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915026089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:23,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:23,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:28:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414166640] [2022-11-23 03:28:23,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:23,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:28:23,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:28:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,042 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:24,198 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-11-23 03:28:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:28:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 03:28:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:24,212 INFO L225 Difference]: With dead ends: 118 [2022-11-23 03:28:24,212 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 03:28:24,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,218 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:24,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 128 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 03:28:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 68. [2022-11-23 03:28:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.868421052631579) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-11-23 03:28:24,261 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 5 [2022-11-23 03:28:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:24,261 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-11-23 03:28:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-11-23 03:28:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 03:28:24,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:24,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:28:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:28:24,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:24,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2022-11-23 03:28:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:24,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646167538] [2022-11-23 03:28:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:24,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646167538] [2022-11-23 03:28:24,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646167538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:24,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:24,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:28:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611704098] [2022-11-23 03:28:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:28:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:28:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,457 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:24,569 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-11-23 03:28:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:28:24,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 03:28:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:24,572 INFO L225 Difference]: With dead ends: 120 [2022-11-23 03:28:24,572 INFO L226 Difference]: Without dead ends: 120 [2022-11-23 03:28:24,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,574 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 65 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:24,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-23 03:28:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 66. [2022-11-23 03:28:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-23 03:28:24,583 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 5 [2022-11-23 03:28:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:24,583 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-23 03:28:24,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-23 03:28:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 03:28:24,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:24,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:24,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:28:24,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1808567273, now seen corresponding path program 1 times [2022-11-23 03:28:24,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:24,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484046637] [2022-11-23 03:28:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:24,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484046637] [2022-11-23 03:28:24,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484046637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:24,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:24,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:28:24,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350353430] [2022-11-23 03:28:24,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:24,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:28:24,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:24,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:28:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,664 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:24,684 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-11-23 03:28:24,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:28:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 03:28:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:24,687 INFO L225 Difference]: With dead ends: 77 [2022-11-23 03:28:24,688 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 03:28:24,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:28:24,690 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:24,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:28:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 03:28:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-23 03:28:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-11-23 03:28:24,707 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 7 [2022-11-23 03:28:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:24,707 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-11-23 03:28:24,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-11-23 03:28:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 03:28:24,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:24,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:24,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:28:24,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2022-11-23 03:28:24,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:24,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281561353] [2022-11-23 03:28:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:24,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:24,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281561353] [2022-11-23 03:28:24,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281561353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:24,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:24,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:28:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740514476] [2022-11-23 03:28:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:28:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:28:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:24,925 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:25,139 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-23 03:28:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:28:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 03:28:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:25,145 INFO L225 Difference]: With dead ends: 115 [2022-11-23 03:28:25,145 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 03:28:25,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:25,156 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 161 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:25,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 03:28:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 66. [2022-11-23 03:28:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-23 03:28:25,163 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 9 [2022-11-23 03:28:25,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:25,164 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-23 03:28:25,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-23 03:28:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 03:28:25,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:25,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:28:25,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:25,172 INFO L85 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2022-11-23 03:28:25,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:25,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3525283] [2022-11-23 03:28:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:25,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3525283] [2022-11-23 03:28:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3525283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:25,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:25,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:28:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695527034] [2022-11-23 03:28:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:28:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:28:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:25,390 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:25,526 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-23 03:28:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:28:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 03:28:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:25,528 INFO L225 Difference]: With dead ends: 70 [2022-11-23 03:28:25,528 INFO L226 Difference]: Without dead ends: 70 [2022-11-23 03:28:25,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:25,535 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 184 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:25,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 42 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-23 03:28:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-23 03:28:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-11-23 03:28:25,549 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 9 [2022-11-23 03:28:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:25,550 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-11-23 03:28:25,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-11-23 03:28:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 03:28:25,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:25,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:25,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:28:25,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash -718760675, now seen corresponding path program 1 times [2022-11-23 03:28:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:25,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326919529] [2022-11-23 03:28:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326919529] [2022-11-23 03:28:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326919529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986882257] [2022-11-23 03:28:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:25,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:28:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:28:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:25,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:25,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986882257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:25,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:25,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-23 03:28:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497744699] [2022-11-23 03:28:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:25,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:28:25,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:28:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:25,948 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:25,976 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-11-23 03:28:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:28:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 03:28:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:25,978 INFO L225 Difference]: With dead ends: 74 [2022-11-23 03:28:25,978 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 03:28:25,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:25,980 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:25,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 184 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:28:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 03:28:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 03:28:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-11-23 03:28:26,004 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 16 [2022-11-23 03:28:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:26,004 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-11-23 03:28:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-11-23 03:28:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 03:28:26,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:26,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:26,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:26,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:26,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:26,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 2 times [2022-11-23 03:28:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458840305] [2022-11-23 03:28:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:26,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:26,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458840305] [2022-11-23 03:28:26,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458840305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534114080] [2022-11-23 03:28:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:28:26,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:26,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:26,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:28:26,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:28:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:28:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:28:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:28:26,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:28:26,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534114080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:26,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:28:26,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-23 03:28:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233190503] [2022-11-23 03:28:26,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:28:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:28:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:26,602 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:26,629 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-11-23 03:28:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:28:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 03:28:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:26,631 INFO L225 Difference]: With dead ends: 117 [2022-11-23 03:28:26,631 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 03:28:26,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:28:26,633 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 143 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:26,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:28:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 03:28:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2022-11-23 03:28:26,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-23 03:28:26,644 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 25 [2022-11-23 03:28:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:26,645 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-23 03:28:26,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-23 03:28:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 03:28:26,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:26,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:26,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:26,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:26,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 1 times [2022-11-23 03:28:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:26,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437760827] [2022-11-23 03:28:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:26,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:28:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:27,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437760827] [2022-11-23 03:28:27,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437760827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:27,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269933316] [2022-11-23 03:28:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:27,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:27,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:27,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:28:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:28:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:27,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:28:27,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:27,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:28:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:27,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:28:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:27,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:27,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269933316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:27,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:27,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-11-23 03:28:27,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552537494] [2022-11-23 03:28:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:27,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:28:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:28:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:28:27,716 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:27,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:27,907 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-11-23 03:28:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:28:27,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 03:28:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:27,909 INFO L225 Difference]: With dead ends: 116 [2022-11-23 03:28:27,909 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 03:28:27,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:28:27,910 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:27,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 113 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:28:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 03:28:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2022-11-23 03:28:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.56) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-23 03:28:27,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 25 [2022-11-23 03:28:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:27,914 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-23 03:28:27,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-23 03:28:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 03:28:27,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:27,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:27,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:28,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 03:28:28,121 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307114, now seen corresponding path program 1 times [2022-11-23 03:28:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571256862] [2022-11-23 03:28:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:28:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571256862] [2022-11-23 03:28:28,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571256862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4769272] [2022-11-23 03:28:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:28,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:28,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:28,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:28:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:28,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 03:28:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:28,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:28:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:28,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:28:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:28,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:28:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:28,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:29,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4769272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:29,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:29,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-11-23 03:28:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351311130] [2022-11-23 03:28:29,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:29,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:28:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:28:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:28:29,249 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:29,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:29,447 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-11-23 03:28:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:28:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 03:28:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:29,448 INFO L225 Difference]: With dead ends: 99 [2022-11-23 03:28:29,449 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 03:28:29,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:28:29,449 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 376 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 50 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 03:28:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2022-11-23 03:28:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.44) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-23 03:28:29,453 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 25 [2022-11-23 03:28:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:29,453 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-23 03:28:29,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-23 03:28:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 03:28:29,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:29,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:29,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:29,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912971, now seen corresponding path program 1 times [2022-11-23 03:28:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493416217] [2022-11-23 03:28:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:28:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493416217] [2022-11-23 03:28:29,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493416217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:29,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:29,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:28:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952876230] [2022-11-23 03:28:29,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:29,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:28:29,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:28:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:28:29,911 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:30,258 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-11-23 03:28:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:28:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 03:28:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:30,260 INFO L225 Difference]: With dead ends: 98 [2022-11-23 03:28:30,260 INFO L226 Difference]: Without dead ends: 98 [2022-11-23 03:28:30,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:28:30,261 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 240 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:30,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 229 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:28:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-23 03:28:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-11-23 03:28:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-11-23 03:28:30,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 26 [2022-11-23 03:28:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:30,264 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-11-23 03:28:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-11-23 03:28:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 03:28:30,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:30,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:30,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:28:30,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912972, now seen corresponding path program 1 times [2022-11-23 03:28:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250108568] [2022-11-23 03:28:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:30,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:30,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250108568] [2022-11-23 03:28:30,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250108568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:30,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:30,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:28:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254664163] [2022-11-23 03:28:30,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:30,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:28:30,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:28:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:28:30,607 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:30,987 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-23 03:28:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:28:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 03:28:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:30,989 INFO L225 Difference]: With dead ends: 93 [2022-11-23 03:28:30,989 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 03:28:30,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:28:30,990 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 455 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:30,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 132 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:28:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 03:28:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-11-23 03:28:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-11-23 03:28:30,992 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2022-11-23 03:28:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:30,992 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-11-23 03:28:30,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-11-23 03:28:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 03:28:30,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:30,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:30,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 03:28:30,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:30,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1883258256, now seen corresponding path program 1 times [2022-11-23 03:28:30,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:30,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856975448] [2022-11-23 03:28:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:31,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856975448] [2022-11-23 03:28:31,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856975448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:31,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:31,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:28:31,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034476433] [2022-11-23 03:28:31,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:28:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:28:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:28:31,189 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:31,415 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-11-23 03:28:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:28:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 03:28:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:31,415 INFO L225 Difference]: With dead ends: 69 [2022-11-23 03:28:31,415 INFO L226 Difference]: Without dead ends: 69 [2022-11-23 03:28:31,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:28:31,416 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 344 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:31,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 92 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-23 03:28:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-23 03:28:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-23 03:28:31,419 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 29 [2022-11-23 03:28:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:31,419 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-23 03:28:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-23 03:28:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 03:28:31,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:31,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:31,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 03:28:31,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:31,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967250, now seen corresponding path program 1 times [2022-11-23 03:28:31,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:31,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807014821] [2022-11-23 03:28:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:31,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:31,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:31,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807014821] [2022-11-23 03:28:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807014821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:31,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:31,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 03:28:31,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892519860] [2022-11-23 03:28:31,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:31,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:28:31,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:28:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:28:31,857 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:32,547 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-23 03:28:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:28:32,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 03:28:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:32,549 INFO L225 Difference]: With dead ends: 115 [2022-11-23 03:28:32,549 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 03:28:32,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:28:32,550 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 557 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:32,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 183 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:28:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 03:28:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-11-23 03:28:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-23 03:28:32,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 30 [2022-11-23 03:28:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:32,554 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-23 03:28:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-23 03:28:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 03:28:32,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:32,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:32,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 03:28:32,559 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967249, now seen corresponding path program 1 times [2022-11-23 03:28:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:32,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159663227] [2022-11-23 03:28:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:28:32,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159663227] [2022-11-23 03:28:32,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159663227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:32,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:32,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:28:32,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655623128] [2022-11-23 03:28:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:32,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:28:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:28:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:28:32,685 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:32,809 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-11-23 03:28:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:28:32,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 03:28:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:32,810 INFO L225 Difference]: With dead ends: 77 [2022-11-23 03:28:32,811 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 03:28:32,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:28:32,811 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:32,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 122 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 03:28:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-11-23 03:28:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.4) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-11-23 03:28:32,814 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 30 [2022-11-23 03:28:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:32,814 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-11-23 03:28:32,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-11-23 03:28:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 03:28:32,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:32,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 03:28:32,815 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1748536300, now seen corresponding path program 1 times [2022-11-23 03:28:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:32,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138996067] [2022-11-23 03:28:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:32,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138996067] [2022-11-23 03:28:33,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138996067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:33,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:33,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:28:33,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27211698] [2022-11-23 03:28:33,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:33,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:28:33,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:28:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:28:33,030 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:33,359 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-11-23 03:28:33,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:28:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 03:28:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:33,361 INFO L225 Difference]: With dead ends: 93 [2022-11-23 03:28:33,361 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 03:28:33,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:28:33,362 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 420 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:33,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 117 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:28:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 03:28:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2022-11-23 03:28:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.380952380952381) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-11-23 03:28:33,365 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 30 [2022-11-23 03:28:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-11-23 03:28:33,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-11-23 03:28:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 03:28:33,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:33,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:28:33,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1629949454, now seen corresponding path program 1 times [2022-11-23 03:28:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597199234] [2022-11-23 03:28:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:28:33,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:33,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597199234] [2022-11-23 03:28:33,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597199234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:33,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:28:33,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:28:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360958320] [2022-11-23 03:28:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:33,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:28:33,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:28:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:28:33,462 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:33,542 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-23 03:28:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:28:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-23 03:28:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:33,543 INFO L225 Difference]: With dead ends: 78 [2022-11-23 03:28:33,543 INFO L226 Difference]: Without dead ends: 78 [2022-11-23 03:28:33,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:28:33,545 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:33,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 116 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-23 03:28:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-23 03:28:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-23 03:28:33,548 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 31 [2022-11-23 03:28:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:33,548 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-23 03:28:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-23 03:28:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:28:33,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:33,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 03:28:33,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1425315259, now seen corresponding path program 1 times [2022-11-23 03:28:33,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:33,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960535807] [2022-11-23 03:28:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:34,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960535807] [2022-11-23 03:28:34,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960535807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26553736] [2022-11-23 03:28:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:34,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:34,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:28:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:34,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 03:28:34,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:34,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:28:34,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 140 [2022-11-23 03:28:34,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:28:34,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 150 [2022-11-23 03:28:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:28:37,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:28:37,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26553736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:37,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:28:37,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2022-11-23 03:28:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545754203] [2022-11-23 03:28:37,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:28:37,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:28:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:28:37,556 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:38,076 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-11-23 03:28:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:28:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 03:28:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:38,078 INFO L225 Difference]: With dead ends: 81 [2022-11-23 03:28:38,078 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 03:28:38,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-11-23 03:28:38,079 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:38,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 246 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:28:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 03:28:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-11-23 03:28:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-11-23 03:28:38,082 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 32 [2022-11-23 03:28:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:38,082 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-11-23 03:28:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-11-23 03:28:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 03:28:38,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:38,083 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:38,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:38,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 03:28:38,284 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1011174575, now seen corresponding path program 1 times [2022-11-23 03:28:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:38,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749426813] [2022-11-23 03:28:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:28:38,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:38,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749426813] [2022-11-23 03:28:38,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749426813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:38,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071111222] [2022-11-23 03:28:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:38,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:28:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:28:38,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:38,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:38,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:28:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:28:38,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:28:38,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071111222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:28:38,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:28:38,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-23 03:28:38,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241786231] [2022-11-23 03:28:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:28:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:28:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:28:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:28:38,914 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:39,023 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-11-23 03:28:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:28:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 03:28:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:39,025 INFO L225 Difference]: With dead ends: 84 [2022-11-23 03:28:39,025 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 03:28:39,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:28:39,026 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:39,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 79 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:28:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 03:28:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-11-23 03:28:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-23 03:28:39,028 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 32 [2022-11-23 03:28:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:39,028 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-23 03:28:39,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-23 03:28:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 03:28:39,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:39,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:39,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:28:39,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:28:39,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:28:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:28:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash -366548792, now seen corresponding path program 1 times [2022-11-23 03:28:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:28:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695748692] [2022-11-23 03:28:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:28:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:28:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695748692] [2022-11-23 03:28:40,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695748692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:28:40,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676861621] [2022-11-23 03:28:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:28:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:28:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:28:40,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:28:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:28:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:28:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-23 03:28:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:28:40,605 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:28:40,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:28:40,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-11-23 03:28:40,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-11-23 03:28:41,428 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-23 03:28:41,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 43 [2022-11-23 03:28:41,444 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-23 03:28:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-23 03:28:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:41,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:28:42,498 INFO L350 Elim1Store]: Elim1 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 130 treesize of output 122 [2022-11-23 03:28:42,631 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-11-23 03:28:42,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 287 [2022-11-23 03:28:43,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:28:43,178 INFO L321 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-11-23 03:28:43,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 259 [2022-11-23 03:28:43,318 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-11-23 03:28:43,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 560 treesize of output 535 [2022-11-23 03:28:53,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-23 03:28:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:28:53,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676861621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:28:53,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:28:53,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 16] total 51 [2022-11-23 03:28:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787440054] [2022-11-23 03:28:53,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:28:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 03:28:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:28:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 03:28:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2482, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 03:28:53,792 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:28:59,980 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-11-23 03:28:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 03:28:59,980 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 03:28:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:28:59,981 INFO L225 Difference]: With dead ends: 161 [2022-11-23 03:28:59,981 INFO L226 Difference]: Without dead ends: 161 [2022-11-23 03:28:59,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1228, Invalid=5414, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 03:28:59,984 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2291 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:28:59,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 626 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 03:28:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-23 03:28:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 80. [2022-11-23 03:28:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.328358208955224) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-11-23 03:28:59,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2022-11-23 03:28:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:28:59,988 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-11-23 03:28:59,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:28:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-11-23 03:28:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 03:28:59,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:28:59,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:28:59,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 03:29:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:00,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -366548793, now seen corresponding path program 1 times [2022-11-23 03:29:00,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:00,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107385489] [2022-11-23 03:29:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107385489] [2022-11-23 03:29:00,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107385489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:00,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154025527] [2022-11-23 03:29:00,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:00,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:00,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:00,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:29:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 03:29:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:01,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:29:01,274 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 03:29:01,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 03:29:01,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:29:01,923 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 03:29:02,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-23 03:29:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:29:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:29:02,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:02,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 19 [2022-11-23 03:29:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:02,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:02,448 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 32 [2022-11-23 03:29:02,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:02,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 184 [2022-11-23 03:29:03,520 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 03:29:03,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2022-11-23 03:29:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:03,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154025527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:03,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:03,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-11-23 03:29:03,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72435080] [2022-11-23 03:29:03,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:03,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 03:29:03,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:03,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 03:29:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 03:29:03,525 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:11,099 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-11-23 03:29:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:29:11,100 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 03:29:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:11,101 INFO L225 Difference]: With dead ends: 102 [2022-11-23 03:29:11,101 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 03:29:11,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=790, Invalid=3766, Unknown=0, NotChecked=0, Total=4556 [2022-11-23 03:29:11,103 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 735 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:11,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 621 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 03:29:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 03:29:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2022-11-23 03:29:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 79 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-11-23 03:29:11,107 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 34 [2022-11-23 03:29:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:11,107 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-11-23 03:29:11,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-11-23 03:29:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 03:29:11,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:11,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:11,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 03:29:11,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:11,315 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:11,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:11,316 INFO L85 PathProgramCache]: Analyzing trace with hash -66070095, now seen corresponding path program 1 times [2022-11-23 03:29:11,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:11,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604597948] [2022-11-23 03:29:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:29:11,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:11,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604597948] [2022-11-23 03:29:11,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604597948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339893431] [2022-11-23 03:29:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:11,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:11,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:11,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:11,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:29:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:11,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:29:11,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:11,753 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-23 03:29:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:29:11,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:29:11,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339893431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:11,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:11,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 11 [2022-11-23 03:29:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225517026] [2022-11-23 03:29:11,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:29:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:29:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:29:11,781 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:12,368 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-23 03:29:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:29:12,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 03:29:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:12,370 INFO L225 Difference]: With dead ends: 94 [2022-11-23 03:29:12,370 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 03:29:12,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:29:12,371 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:12,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 209 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:29:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 03:29:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2022-11-23 03:29:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-11-23 03:29:12,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 36 [2022-11-23 03:29:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:12,374 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-11-23 03:29:12,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-11-23 03:29:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 03:29:12,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:12,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:12,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:12,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash -66070094, now seen corresponding path program 1 times [2022-11-23 03:29:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:12,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464797234] [2022-11-23 03:29:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:29:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464797234] [2022-11-23 03:29:13,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464797234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201950743] [2022-11-23 03:29:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:13,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:13,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:13,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:29:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:29:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:13,232 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 3 [2022-11-23 03:29:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:29:13,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:29:13,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201950743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:13,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2022-11-23 03:29:13,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146293529] [2022-11-23 03:29:13,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:13,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:29:13,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:13,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:29:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:29:13,331 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:14,314 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-11-23 03:29:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:29:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 03:29:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:14,318 INFO L225 Difference]: With dead ends: 111 [2022-11-23 03:29:14,319 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 03:29:14,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-23 03:29:14,320 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 517 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:14,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 192 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:29:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 03:29:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2022-11-23 03:29:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-11-23 03:29:14,323 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 36 [2022-11-23 03:29:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:14,323 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-11-23 03:29:14,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-11-23 03:29:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 03:29:14,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:14,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:14,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:14,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:14,530 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash -897341486, now seen corresponding path program 1 times [2022-11-23 03:29:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351387051] [2022-11-23 03:29:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:29:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351387051] [2022-11-23 03:29:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351387051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:29:14,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:29:14,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:29:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360746288] [2022-11-23 03:29:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:29:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:29:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:29:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:29:14,614 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:14,672 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-11-23 03:29:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:29:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 03:29:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:14,674 INFO L225 Difference]: With dead ends: 83 [2022-11-23 03:29:14,674 INFO L226 Difference]: Without dead ends: 83 [2022-11-23 03:29:14,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:29:14,675 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:29:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-23 03:29:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-23 03:29:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.25) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-11-23 03:29:14,680 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 36 [2022-11-23 03:29:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:14,681 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-11-23 03:29:14,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-11-23 03:29:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 03:29:14,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:14,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 03:29:14,682 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2047782270, now seen corresponding path program 1 times [2022-11-23 03:29:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368549153] [2022-11-23 03:29:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368549153] [2022-11-23 03:29:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368549153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512774169] [2022-11-23 03:29:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:15,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:15,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:15,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:29:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 03:29:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:15,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:29:16,162 INFO L321 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-11-23 03:29:16,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2022-11-23 03:29:16,266 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 8 [2022-11-23 03:29:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:16,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:16,371 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 19 [2022-11-23 03:29:16,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:16,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 139 [2022-11-23 03:29:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:16,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512774169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:16,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:16,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 40 [2022-11-23 03:29:16,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113049637] [2022-11-23 03:29:16,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:16,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 03:29:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 03:29:16,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 03:29:16,909 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:18,369 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-23 03:29:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:29:18,370 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 03:29:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:18,371 INFO L225 Difference]: With dead ends: 94 [2022-11-23 03:29:18,371 INFO L226 Difference]: Without dead ends: 92 [2022-11-23 03:29:18,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 03:29:18,372 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 803 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:18,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 443 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:29:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-23 03:29:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-11-23 03:29:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-23 03:29:18,375 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 37 [2022-11-23 03:29:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:18,376 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-23 03:29:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-23 03:29:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 03:29:18,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:18,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:18,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:18,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 03:29:18,583 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 931150289, now seen corresponding path program 1 times [2022-11-23 03:29:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694506620] [2022-11-23 03:29:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:19,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694506620] [2022-11-23 03:29:19,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694506620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:19,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113432919] [2022-11-23 03:29:19,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:19,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:19,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:19,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:29:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 03:29:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:20,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-11-23 03:29:20,271 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 19 [2022-11-23 03:29:20,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:20,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-11-23 03:29:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:20,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:20,719 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 18 [2022-11-23 03:29:20,989 INFO L321 Elim1Store]: treesize reduction 13, result has 62.9 percent of original size [2022-11-23 03:29:20,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 109 [2022-11-23 03:29:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:21,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113432919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:29:21,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:29:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 41 [2022-11-23 03:29:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933274978] [2022-11-23 03:29:21,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:29:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 03:29:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:29:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 03:29:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 03:29:21,113 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:29:24,110 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-11-23 03:29:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 03:29:24,110 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-23 03:29:24,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:29:24,110 INFO L225 Difference]: With dead ends: 102 [2022-11-23 03:29:24,111 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 03:29:24,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=721, Invalid=3701, Unknown=0, NotChecked=0, Total=4422 [2022-11-23 03:29:24,113 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1200 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:29:24,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 561 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 03:29:24,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 03:29:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 81. [2022-11-23 03:29:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-11-23 03:29:24,116 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 38 [2022-11-23 03:29:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:29:24,116 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-11-23 03:29:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:29:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-11-23 03:29:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 03:29:24,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:29:24,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:29:24,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:29:24,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 03:29:24,324 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:29:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:29:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash 931202878, now seen corresponding path program 2 times [2022-11-23 03:29:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:29:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389180342] [2022-11-23 03:29:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:29:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:29:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:29:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:29:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389180342] [2022-11-23 03:29:25,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389180342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:29:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728845700] [2022-11-23 03:29:25,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:29:25,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:29:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:29:25,749 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:29:25,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:29:25,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:29:25,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:29:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 03:29:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:29:26,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:29:26,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-11-23 03:29:26,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-11-23 03:29:26,297 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:29:26,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 03:29:26,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:29:26,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:29:26,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:29:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:29:26,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 03:29:26,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 03:29:27,543 INFO L321 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2022-11-23 03:29:27,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 97 [2022-11-23 03:29:27,562 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 03:29:27,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 54 [2022-11-23 03:29:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:29:27,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:29:29,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:29,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 110 treesize of output 98 [2022-11-23 03:29:29,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:29,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 78 [2022-11-23 03:29:29,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:29,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 110 treesize of output 93 [2022-11-23 03:29:29,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:29,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 90 treesize of output 78 [2022-11-23 03:29:30,018 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_4)) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_3))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (+ (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse0)) (not (= (select v_arrayElimArr_4 .cse1) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (= (select (select .cse2 (select (select .cse2 .cse0) .cse1)) (+ (select (select .cse3 .cse0) .cse1) 4)) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_3 .cse1))))))) (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_2)) (.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select .cse6 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse4)) (not (= (select v_arrayElimArr_1 .cse5) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select (select .cse6 (select (select .cse7 .cse4) .cse5)) (+ (select (select .cse6 .cse4) .cse5) 4)) 0) (not (= (select v_arrayElimArr_2 .cse5) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))))))) is different from false [2022-11-23 03:29:30,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:30,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 150 treesize of output 120 [2022-11-23 03:29:30,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:30,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 149 treesize of output 99 [2022-11-23 03:29:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:29:30,910 INFO L321 Elim1Store]: treesize reduction 53, result has 76.1 percent of original size [2022-11-23 03:29:30,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 324 treesize of output 412 [2022-11-23 03:29:31,365 INFO L321 Elim1Store]: treesize reduction 58, result has 82.4 percent of original size [2022-11-23 03:29:31,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 1110 treesize of output 1078 [2022-11-23 03:29:31,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:31,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 942 treesize of output 856 [2022-11-23 03:29:31,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:29:31,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 839 treesize of output 809 [2022-11-23 03:31:22,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:31:22,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 150 treesize of output 110 [2022-11-23 03:31:22,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:31:22,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 139 treesize of output 99 [2022-11-23 03:31:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:31:22,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:31:22,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 220 [2022-11-23 03:31:24,111 INFO L321 Elim1Store]: treesize reduction 297, result has 78.8 percent of original size [2022-11-23 03:31:24,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 690 treesize of output 1510 [2022-11-23 03:31:24,372 INFO L321 Elim1Store]: treesize reduction 12, result has 91.2 percent of original size [2022-11-23 03:31:24,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1089 treesize of output 957 [2022-11-23 03:31:24,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:31:24,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1002 treesize of output 662 [2022-11-23 03:36:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-23 03:36:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728845700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:36:57,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:36:57,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 59 [2022-11-23 03:36:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936937671] [2022-11-23 03:36:57,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:36:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-23 03:36:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:36:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-23 03:36:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3146, Unknown=2, NotChecked=112, Total=3422 [2022-11-23 03:36:57,997 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:03,659 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-11-23 03:37:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:37:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-23 03:37:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:03,661 INFO L225 Difference]: With dead ends: 120 [2022-11-23 03:37:03,661 INFO L226 Difference]: Without dead ends: 120 [2022-11-23 03:37:03,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=469, Invalid=5233, Unknown=2, NotChecked=148, Total=5852 [2022-11-23 03:37:03,663 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 243 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:03,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1001 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1360 Invalid, 0 Unknown, 67 Unchecked, 1.8s Time] [2022-11-23 03:37:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-23 03:37:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2022-11-23 03:37:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 103 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2022-11-23 03:37:03,666 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 38 [2022-11-23 03:37:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:03,666 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2022-11-23 03:37:03,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2022-11-23 03:37:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 03:37:03,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:03,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 03:37:03,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 03:37:03,868 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:37:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 685031799, now seen corresponding path program 1 times [2022-11-23 03:37:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:03,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845384695] [2022-11-23 03:37:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:37:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845384695] [2022-11-23 03:37:03,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845384695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:37:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261782546] [2022-11-23 03:37:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:03,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:03,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:03,991 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:04,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:37:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:37:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 03:37:04,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 03:37:04,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261782546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:04,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:37:04,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-23 03:37:04,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919703452] [2022-11-23 03:37:04,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:04,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:37:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:37:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:37:04,340 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:04,372 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-11-23 03:37:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:37:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-23 03:37:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:04,374 INFO L225 Difference]: With dead ends: 119 [2022-11-23 03:37:04,374 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 03:37:04,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:37:04,375 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 115 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:04,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 138 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:37:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 03:37:04,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-11-23 03:37:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2022-11-23 03:37:04,378 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 43 [2022-11-23 03:37:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:04,379 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2022-11-23 03:37:04,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2022-11-23 03:37:04,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 03:37:04,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:04,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:04,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 03:37:04,583 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:37:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash 685031799, now seen corresponding path program 1 times [2022-11-23 03:37:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829161364] [2022-11-23 03:37:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:04,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:37:04,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829161364] [2022-11-23 03:37:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829161364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:37:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051945881] [2022-11-23 03:37:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:04,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:04,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:04,795 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:04,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:37:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 03:37:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:37:05,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:37:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 03:37:05,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:05,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:37:05,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 03:37:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 03:37:05,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051945881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:05,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:37:05,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-11-23 03:37:05,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750535153] [2022-11-23 03:37:05,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:05,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:37:05,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:37:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:37:05,310 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:05,451 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-11-23 03:37:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:37:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-23 03:37:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:05,452 INFO L225 Difference]: With dead ends: 116 [2022-11-23 03:37:05,452 INFO L226 Difference]: Without dead ends: 116 [2022-11-23 03:37:05,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:37:05,453 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 262 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:05,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 84 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:37:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-23 03:37:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2022-11-23 03:37:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.202020202020202) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-11-23 03:37:05,456 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 43 [2022-11-23 03:37:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:05,456 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-11-23 03:37:05,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:37:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-11-23 03:37:05,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 03:37:05,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:05,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:05,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:05,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:05,657 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 03:37:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash -238850691, now seen corresponding path program 1 times [2022-11-23 03:37:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:05,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528492338] [2022-11-23 03:37:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:37:07,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:07,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528492338] [2022-11-23 03:37:07,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528492338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:37:07,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385353889] [2022-11-23 03:37:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:07,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:07,199 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3ea17ce-83c7-46f6-a5af-742bc9c4c633/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:37:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:07,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-23 03:37:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:07,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:37:07,483 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:37:07,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-23 03:37:07,785 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-23 03:37:07,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 03:37:08,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:37:08,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-11-23 03:37:09,814 INFO L321 Elim1Store]: treesize reduction 139, result has 44.4 percent of original size [2022-11-23 03:37:09,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 165 [2022-11-23 03:37:13,681 INFO L321 Elim1Store]: treesize reduction 118, result has 39.2 percent of original size [2022-11-23 03:37:13,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 149 treesize of output 210 [2022-11-23 03:37:15,907 INFO L321 Elim1Store]: treesize reduction 194, result has 38.4 percent of original size [2022-11-23 03:37:15,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 267 treesize of output 231 [2022-11-23 03:37:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:37:18,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:19,838 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 4 [2022-11-23 03:37:22,160 INFO L321 Elim1Store]: treesize reduction 132, result has 71.1 percent of original size [2022-11-23 03:37:22,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 1887 treesize of output 1842 [2022-11-23 03:42:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:42:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385353889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:42:07,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:42:07,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 74 [2022-11-23 03:42:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399339072] [2022-11-23 03:42:07,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:42:07,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-23 03:42:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:42:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-23 03:42:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=5206, Unknown=0, NotChecked=0, Total=5550 [2022-11-23 03:42:07,679 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 75 states, 74 states have (on average 1.635135135135135) internal successors, (121), 75 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)